The Complete Guide to Pilot G2 Pens: Tips, Sizes, and Refills

The Pilot G2 pen is one of the most popular gel pens in the U.S.—but which size is right for you?
Whether you’re comparing Pilot G2 sizes, wondering if it’s truly a gel pen, or searching for the best option for journaling, note-taking, or drawing—this guide has you covered.

We’ll explore every G2 variation, from ultra-fine to bold tips, and cover essential details like gel pen refills, archival ink, and whether these pens are waterproof. Plus, you’ll see how the G2 stacks up against top competitors like Pentel EnerGel and Uni-ball Signo.

In this complete 2025 breakdown, you’ll find expert tips, clear comparisons, and practical recommendations—so you can choose the best Pilot G2 pen for your needs, fast.

1. Is the Pilot G2 a Ballpoint Pen?

The Pilot G2 pen is a gel ink pen, not a ballpoint—though the naming can be a bit confusing. Pilot refers to it as a “gel rollerball” because it uses a rolling ball tip mechanism.

However, unlike traditional rollerballs that use liquid ink, the Pilot G2 gel pen contains rich, water-based gel ink that glides smoothly and delivers vibrant lines.

It’s also refillable, with a wide range of gel ink refills available in different tip sizes and colors.

So what’s the difference between gel pens vs ballpoints or rollerballs—and which is right for your writing style? Learn more in our full comparison of ballpoint, gel, and rollerball pens.

Want to see how the G2 performs in action? Check out our Pilot G2 07 Review to discover why it’s the most popular model in the lineup.

---

2. Pilot G2 Pen Sizes & Types

The Pilot G2 pen lineup offers one of the most diverse ranges of gel pen tip sizes and styles available.

Whether you’re looking for a precise ultra fine gel pen for bullet journaling or a bold-tip pen for expressive writing, there’s a Pilot G2 for every task.

All models feature smooth, refillable gel ink refills, and many use the same interchangeable cartridges—making them highly versatile.

Let’s break it down:

---

2A. Pilot G2 Pen Tip Sizes

Pilot G2 pens are available in four main tip sizes to suit a wide range of writing styles:

• 0.38mm (Ultra Fine)
• 0.5mm (Extra Fine)
• 0.7mm (Fine)
• 1.0mm (Bold)

✅ 2.1 Pilot G2 0.38 Ultra Fine Tip

The thinnest G2 tip available, ideal for planners, precision work, or small handwriting.
Popular in Asia where ultra-fine writing is preferred. Available in black, blue, red, and green.

📝 Read the Full Pilot G2 0.38 Review

✅ 2.2 Pilot G2 05 Extra Fine Tip

The 0.5mm tip delivers a perfect balance between control and smoothness.
Ideal for journaling, note-taking, and everyday writing. Available in a broader color range than the 0.38mm.

✅ 2.3 Pilot G2 07 Fine Tip

The most iconic and widely loved size in the G2 range.
Known for smooth writing and available in an extensive color selection, including metallic and pastel.

📝 Read the Full Pilot G2 07 Review

✅ 2.4 Pilot G2 10 Bold Tip

A bold 1.0mm tip for those who prefer expressive, heavy lines.
Perfect for signing documents or bold sketching.

---

2B. Pilot G2 Pen Variants

Beyond tip size, the Pilot G2 is available in several body styles and special editions:

✅ 2.5 Pilot G2 Mini (Pixie / XS)

Compact version of the G2 07, measuring just 11.2 cm.
Ideal for travel or small notebooks. Despite its size, it delivers the same smooth writing.

📝 Read the Full G2 Pixie Review

✅ 2.6 Pilot G2 Mika Limited Edition

A vibrant, limited-edition version of the G2 07 designed in collaboration with pop star Mika.
Features unique colorful barrels but the same core specs.

🔎 Currently a collector’s item — check availability on Amazon or eBay.

✅ 2.7 Pilot G2 Limited

A premium, all-metal G2 with a sleek, professional look and 0.7mm tip.
Uses the same refill as the standard G2 07.

👉 Check Price & Reviews on Amazon

✅ 2.8 Pilot G2 Pro

Built for comfort with a wider barrel and enhanced grip.
0.7mm tip and refill-compatible with other G2 pens. Great for long writing sessions.

👉 Check Price & Reviews on Amazon

---

3. Why Is the Pilot G2 So Popular?

The Pilot G2 pen is consistently ranked as the best-selling gel pen in the U.S.—and it’s easy to see why. With smooth gel ink, refillable cartridges, and a comfortable grip, it strikes the perfect balance between performance and affordability.

Some writers do prefer alternatives like the Pentel EnerGel or Uni-ball Jetstream for faster-drying or pigment-based ink. Want to know how they compare? Jump to our G2 vs EnerGel vs Signo comparison for a detailed breakdown.

✔️ Smooth. ✔️ Refillable. ✔️ Reliable. That’s why the Pilot G2 continues to outsell nearly every other gel pen on the market.

---

4. Where Are Pilot G2 Pens Made?

Pilot G2 pens are proudly made in Japan by the Pilot Pen Company, a trusted name in Japanese stationery. While many brands have outsourced production, Pilot has continued to manufacture the G2 in Japan—maintaining the high standards of quality, precision, and reliability the country is known for.

This commitment to craftsmanship is part of what makes the Pilot G2 a top-rated Japanese gel pen, favored by professionals, students, and pen enthusiasts around the world.

Pilot Pen USA official website

---

5. Pilot G2 Length & Writing Distance

The Pilot G2 pen is not only one of the most popular gel pens, it’s also practical in both size and performance.

• Standard Pilot G2 size: 14.3 cm
• G2 Mini (also known as Pilot Pixie or G2 XS): 11.2 cm — great for travel and compact storage

When it comes to longevity, the G2 is widely considered a long-lasting gel pen. But how far does it actually write?

🧪 Real-World Test by Alex Lee:
In a hands-on test by YouTube creator Alex Lee, a single Pilot G2 07 refill was pushed to the limit. It wrote 37 full notebook pages, or approximately 1,166 sentences, before running dry—an impressive result for any gel pen.

👉 Watch the video here:

If you’d like to compare that to how far a ballpoint pen can write, we’ve got you covered. Check out our full write-up on ballpoint pen ink tests, including a University of Reading study that reveals some surprising results across popular UK pens.

With this kind of ink performance and a refillable barrel, it’s no wonder the G2 is a top choice for students, journalers, and everyday writers.

---

6. Are Pilot G2 Pens Waterproof?

Not exactly. Pilot G2 pens use gel ink, which is water-resistant—meaning small splashes or light moisture typically won’t cause smudging. However, if the paper becomes soaked, the ink will likely run or blur, so they’re not considered fully waterproof.

If you’re looking for a waterproof gel pen—something that can handle rain, outdoor use, or rough conditions—you’ll need a pen designed for that purpose. Many writers turn to alternatives like the Fisher Space Pen, popular for its pressurized, waterproof ink, or similar rugged designs.

👉 Love the idea of a heavy-duty pen? Check out our comparison: Is the Uni‑ball Power Tank better than the Fisher Space Pen? It breaks down which one performs best under wet and demanding conditions.

Fisher Space Pen official site

---

7. Does the Pilot G2 Smudge or Bleed Through Paper?

One of the most common questions from students, left‑handed writers, and journal enthusiasts is whether the Pilot G2 smudges or bleeds through paper.

✏️ Smudge Performance

• On standard notebook paper, the G2 performs well—most users won’t notice smudging after a brief pause.
• However, if you’re a lefty or tend to drag your hand across the page, you’ll want to look for quick-drying ink or pair the pen with fast-dry notebooks.
• Compared to ** Pentel EnerGel** and Uni-ball Jetstream, the G2 dries a bit slower but still remains a strong choice for most writing needs.

📖 Bleed‑Through & Ghosting

• On quality writing paper (70–80 gsm), bleed‑through is rare. You may see slight ghosting on both sides of the page.
• On thin or budget paper, especially in planners or loose-leaf notebooks, bold refill sizes like 0.7mm or 1.0mm may bleed.
• For journaling or archival use, opt for a 0.38mm or 0.5mm tip, which greatly reduces bleed-through while preserving ink vibrancy.

📝 Quick Tip:
Pair your G2 with thicker paper—like 90 gsm or 100 gsm—available in options like Rhodia, Leuchtturm1917, or other fast-dry pads to avoid smudging and bleed-through.

---

8. Are Pilot G2 Pens Archival?

Yes. Pilot G2 pens use archival-quality gel ink that is both acid-free and fade-resistant—making them suitable for preserving journals, legal documents, and artwork over time.

Many writers use Pilot G2 pens for archival-safe tasks like note-taking in Moleskine journals, signing important papers, or sketching in long-lasting ink. While they’re not waterproof, they offer excellent protection against aging and yellowing—traits that define a true archival gel pen.

If you’re looking for a reliable pen for document longevity, the G2 is one of the best archival gel pens available in its price range.

---

9. How to Refill a Pilot G2 Pen (Step-by-Step)

Yes, Pilot G2 pens are fully refillable—and the process is simple. You don’t need any tools, and it only takes a few seconds.

Here are your step-by-step instructions to refill a Pilot G2 pen:

1. Hold the rubber grip to keep the pen steady.
2. Twist the barrel counterclockwise to unscrew it.
3. Remove the old ink refill.
4. Insert a new Pilot G2 refill—make sure it’s the correct size (0.38mm, 0.5mm, 0.7mm, or 1.0mm).
5. Screw the barrel back on until it’s secure.

✅ Done! Your Pilot G2 pen is ready to write again.

---

10. Pilot G2 Refills: Sizes, Compatibility & Euro Format

Pilot G2 gel ink refills are some of the most widely used and versatile on the market. Known for their smooth writing, archival-quality ink, and compatibility across multiple Pilot pen models, they’re a staple for students, professionals, and pen enthusiasts alike.

---

✅ Compatible Pilot Pens

You can use Pilot G2 refills in several other pens made by Pilot, including:

• 🖋️ Pilot G6
• ✍️ Dr. Grip Gel
• 🔄 Pilot G-Knock
• 🌱 Bottle 2 Pen (B2P)

Each of these models shares the same refill format, giving you flexibility to mix and match barrels and tips without sacrificing comfort or ink quality.

---

📏 Available Refill Sizes

Pilot G2 refills come in a variety of tip sizes to suit your writing preferences:

• 🪶 0.38mm Ultra Fine – for detailed notes and precision writing
• ✒️ 0.5mm Extra Fine – a balanced option with less ink bleed
• 🖊️ 0.7mm Fine – the most popular size, ideal for everyday use
• 🖍️ 1.0mm Bold – perfect for expressive writing and signatures

They’re also available in a wide range of colors:

• 🖤 Black
• 🔵 Blue
• 🔴 Red
• 🟢 Green
• 🌈 Specialty colors like purple, turquoise, metallics, and pastels

G2 Ink Colors & Refill Codes

Below are the most common refill colors and their official Pilot product codes:

🔹 9.1 Pilot G2 0.38 Ultra Fine Refills

• Black – BG23RBLK
• Blue – BG23RBLU
• Red – BG23RRED
• Green – BG23RGRN

🔹 9.2 Pilot G2 05 Extra Fine Refills

• Black – BG25RBLK-6PK
• Blue – BG25RBLU-6PK
• Red – BG25RRED-6PK

🔹 9.3 Pilot G2 07 Fine Refills

• Black – BG27RBLK-6PK
• Blue – BG27RBLU-6PK
• Red – BG27RRED-6PK
• Green – BG27RGRN-6PK
• Purple – BG27RPPL-6PK
• Navy Blue – BG27RNVY-6PK
• Pink – BG27RPNK-6PK
• Turquoise – BG27RTRQ-6PK
• Burgundy – BG27RBRG-6PK
• Orange – BG27RORG-6PK
• Teal – BG27RTEA-6PK
• Periwinkle – BG27RPWK-6PK
• Lime Green – BG27RLIM-6PK
• Caramel – BG27RCAR-6PK

🔹 9.4 Pilot G2 10 Bold Refills

• Black – BG21RBLK
• Blue – BG21RBLU
• Red – BG21RRED
• Green – BG21RGRN
• Purple – BG21RPPL

---

🔄 Euro Format Compatibility

The Pilot G2 refill conforms to the Euro Format Rollerball Pen standard (ISO 12757-1 RB), which means:

• 📐 Length: 110mm
• 📏 Diameter: 6.3mm

In theory, this allows the G2 refill to fit any pen that accepts Euro-format rollerball refills.
But in reality, compatibility depends on the barrel width and tip housing, which can vary significantly between brands.

💡 Pro Tip:
Even if another pen claims Euro-format compatibility, the Pilot G2 refill may not always fit perfectly due to subtle design differences. Always test before committing to bulk purchases.

👉 Read our Ultimate Guide to Euro Format Rollerball Pen Refills for a deeper dive into which pens truly work with these refills.

---

11. Pilot G2 Refill Compatibility Table

Pen Model	G2 Refill Compatible	Notes
🖊️ Pilot G2	✅ Yes	All tip sizes and colors supported
🖋️ Pilot G6	✅ Yes	Fully compatible
✍️ Dr. Grip Gel	✅ Yes	Same refill format
🔄 Pilot G-Knock	✅ Yes	Retractable G2-compatible
🌱 Pilot B2P	✅ Yes	Eco pen made from recycled bottles
🔀 Other Euro-format pens	⚠️ Sometimes	Fit varies based on tip/barrel design
❌ Lamy M63	❌ No	Uses proprietary refill format

---

🔧 Quick Tip

You can even swap G2 refill sizes in the same pen barrel to suit different needs:

• ✏️ Prefer fine lines and reduced smudging? Use 0.38mm or 0.5mm
• 🖍️ Want bold, expressive strokes? Go with a 1.0mm refill

🛍️ Pilot G2 refills (also known as BLS-G2) are widely available in single and multi-pack options—perfect for long-term use or refilling multiple pens.

---

12. Pilot G2 vs Uni-ball Signo vs Pentel EnerGel

Wondering which gel ink pen is right for your writing needs? In this comparison, we’ll look at how the Pilot G2, Uni-ball Signo 207, and Pentel EnerGel stack up in terms of ink type, drying time, refill options, and more.

✨ Quick Comparison Table

Feature	🖊️ Pilot G2	🖋️ Uni-ball Signo 207	✍️ Pentel EnerGel
Ink Type	Gel (archival)	Pigment (archival)	Pigment (fast-drying)
Water Resistance	Water-resistant	Better than G2	Excellent
Dry Time	Moderate	Quick	Fastest
Refillable	✅ Yes	✅ Yes (fewer options)	✅ Yes
Tip Sizes	0.38–1.0mm	0.5mm, 0.7mm	0.3–1.0mm
Best For	Everyday use	Legal documents	Left-handed users

📝 Verdict

• ✅ Pilot G2 is ideal for everyday writing with a broad range of tip sizes and archival gel ink.
• ✒️ Uni-ball Signo 207 is perfect for signing formal or legal documents where fade-resistance matters.
• 🏃‍♂️ Pentel EnerGel is the top choice for left-handed writers or anyone who needs ultra fast-drying ink.

👉 Want a closer look at the EnerGel? Read our full EnerGel review.
🖐️ Need more options for smudge-free writing? Check out our full guide to the best pens for left-handed writers.

Uni-ball pen line up

Pentel EnerGel official product page

---

13. Pilot G2 vs Pilot FriXion

If you love Pilot pens but can’t decide between the smooth gel ink of the G2 and the erasable magic of the FriXion, here’s how they compare:

Feature	Pilot G2	Pilot FriXion
Ink Type	Gel (archival-quality)	Thermo-sensitive gel (erasable)
Writing Feel	Smooth, bold, and consistent	Lighter, with slightly more resistance
Erasability	❌ Not erasable	✅ Fully erasable using built-in eraser
Water Resistance	Water-resistant	Not water-resistant (can fade with heat)
Archival Quality	✅ Yes (acid-free, fade-resistant)	❌ No (not suitable for permanent records)
Refillable	✅ Yes	✅ Yes (refills available for most FriXion models)
Best For	Notes, journaling, documents, art	School, planners, editing, casual note-taking

Verdict:

Choose the Pilot G2 if you want bold, permanent gel ink that’s ideal for journaling, signatures, or archival use. Go with the Pilot FriXion if you want flexibility to erase mistakes—great for planners, math homework, or creative sketching.

---

14. Best Pilot G2 Pen for Students, Artists & Journaling

Looking for the right Pilot G2 pen for your specific needs? Here’s a quick guide based on tip size, writing comfort, and intended use.

🎓 Best for Students: Pilot G2 07 (Fine Point)

• ✅ Most popular G2 size for everyday use
• 📝 Excellent for note-taking, homework, and fast writing
• 💵 Affordable and widely available in many colors

🎨 Best for Artists: Pilot G2 10 (Bold Tip)

• 🖌️ 1.0mm bold tip for expressive linework
• 🧠 Smooth ink flow, ideal for sketching or outlining
• 🎨 Works well on thicker paper and in sketchbooks

📓 Best for Journaling: Pilot G2 05 (Extra Fine Tip)

• ✒️ 0.5mm tip for detailed writing and bullet journals
• 📖 Minimal bleed-through on journal paper
• 🕰️ Archival-quality ink for long-term preservation

---

🧠 Bonus Tip:

For ultra-precise detail or micro-journaling, the Pilot G2 0.38 Ultra Fine is a great alternative—especially if you prefer clean, compact lines.

---

15. Pilot G2 Pen Not Writing? Troubleshooting Tips & Fixes

If your Pilot G2 gel pen suddenly stops writing, skips, or seems dry—don’t toss it just yet. Here’s how to troubleshoot common issues:

🖊️ Problem: Ink Skipping or Fading

• ✔️ Scribble on scrap paper to restart ink flow
• ✔️ Rub the tip on cardboard to dislodge dry gel ink
• ✔️ Replace the refill if ink is low or inconsistent

🔥 Problem: Gel Pen Feels Dry

• ✔️ Warm the tip with your fingers or a hairdryer
• ✔️ Gently tap the tip on paper to kickstart ink
• ✔️ Swap in a fresh Pilot G2 refill if needed

💧 Problem: Ink Flow Suddenly Stops

• ✔️ Unscrew the pen and reseat the refill
• ✔️ Rotate it 180° to dislodge air bubbles
• ✔️ Try a new refill to rule out defects

🧠 Pro Tip:
Store your Pilot G2 vertically (tip down), and keep it away from heat or cold. Extreme temperatures can affect gel ink consistency.

---

16. Frequently Asked Questions About Pilot G2 Pens

---

17. Where to Buy Pilot G2 Pens in the U.S.

If you’re looking to purchase the Pilot G2, here are top places in the U.S. where you can find the full range—from basic refills to limited editions.

📦 In‑Store Options

• Staples, Office Depot/OfficeMax, and Walmart stock full G2 pen packs and basics like 0.7mm and 1.0mm.
• Target often carries multi-packs, but availability varies regionally.
• Best Buy and CVS/ Walgreens may have select colors & tip sizes closer to checkout.

💻 Online Retailers

• Amazon – Offers the widest selection; ideal for bulk packs, specialty colors, and limited editions like the G2 Limited or Pro.
• JetPens – Great for specialty G2 variants (mini, bold colors) and smaller quantity purchases.
• Pilot’s Official Site (USA) – Occasionally carries exclusive G2 models, replacement refill packs, and direct manufacturer promotions.

💰 Buying Tips for Savings

• Multi‑pack refills (6 to 15 pens) often offer lower per‑pen cost.
• Use subscription deals on Amazon for refills to save up to 15%.
• Watch for back‑to‑school discounts at office supply stores in July/August.

18. Final Thoughts: Is the Pilot G2 the Right Gel Pen for You?

The Pilot G2 isn’t just a pen—it’s a writing essential trusted by students, professionals, and creatives alike. With smooth ink, refillable options, and tip sizes for every need, there’s a reason it’s America’s #1 gel pen.

👉 Ready to find your perfect G2? Check prices and shop now on Amazon to upgrade your writing experience today.