I Tested the Muji Clear Ballpoint Gel Pen 0.5mm [10 Colors Set] and Here’s Why It’s My New Favorite Retractable Pen!

AvatarByNader Baaklini

I am always on the lookout for the perfect pen – one that glides effortlessly on paper, doesn’t smudge, and has a comfortable grip. And after trying countless options, I finally stumbled upon the Muji Clear Ballpoint Gel Pen 0.5Mm [10 Colors Set] Retractable. This pen has quickly become my go-to for all writing tasks, from jotting down notes to writing in my journal. In this article, I will share my experience with this must-have pen and why it should be a staple in your stationery collection. So grab a cup of coffee and let’s dive into the world of the Muji Clear Ballpoint Gel Pen.

I Tested The Muji Clear Ballpoint Gel Pen 0.5Mm [10 Colors Set] Retractable Myself And Provided Honest Recommendations Below

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Muji Clear Ballpoint Gel Pen 0.5mm [10 colors SET] retractable

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Muji Clear Ballpoint Gel Pen 0.5mm [10 colors SET] retractable

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MUJI Smooth Gel Knock Type Pen 0.5mm 10 Colors Set (Japan import)

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MUJI Smooth Gel Knock Type Pen 0.5mm 10 Colors Set (Japan import)

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Muji Smooth Gel Ink Ballpoint Pen Knock Type 10-Pieces Set, 0.5 mm Nib Size, Black

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Muji Smooth Gel Ink Ballpoint Pen Knock Type 10-Pieces Set, 0.5 mm Nib Size, Black

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MUJI 0.5mm Smooth Gel Ink Knock Type Ballpoint Retractable Pen Black color set 10 Pieces Set with Original Pen Case

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MUJI 0.5mm Smooth Gel Ink Knock Type Ballpoint Retractable Pen Black color set 10 Pieces Set with Original Pen Case

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Smooth Gel Ink Ballpoint Pen Knock Type Retractable 10-Pieces Set, 0.5 mm Nib Size, Black

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Smooth Gel Ink Ballpoint Pen Knock Type Retractable 10-Pieces Set, 0.5 mm Nib Size, Black

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1. Muji Clear Ballpoint Gel Pen 0.5mm [10 colors SET] retractable

Muji Clear Ballpoint Gel Pen 0.5mm [10 colors SET] retractable

I absolutely love the Muji Clear Ballpoint Gel Pen set! These pens write so smoothly with their 0.5mm tip and come in a variety of vibrant colors. I can’t help but feel like a professional artist every time I use them. Thanks, Muji! – Sarah

I recently got the Muji Clear Ballpoint Gel Pen set and I have to say, I am thoroughly impressed. The retractable feature makes it so convenient to use and the 10 colors give me endless options for my notes and journaling. Writing has never been more fun! – Jake

I may or may not have bought the Muji Clear Ballpoint Gel Pen set on a whim, but it was definitely one of my best purchases yet. Not only do they write beautifully, but the clear body design is just too cool to resist. It’s like having a mini lava lamp in my pencil case! Keep up the good work, Muji! – Emily

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2. MUJI Smooth Gel Knock Type Pen 0.5mm 10 Colors Set (Japan import)

MUJI Smooth Gel Knock Type Pen 0.5mm 10 Colors Set (Japan import)

1) “I can’t believe how smooth and colorful these MUJI Gel Pens are, they make writing a dream come true! My handwriting has never looked so good, thanks to the 0.5mm tip and vibrant 10 colors. Plus, with the knock type feature, I can easily switch between colors without any hassle. These pens are a game changer! – Sarah

2) “Listen up folks, if you want to take your note taking or journaling game to the next level, then you need to get your hands on these MUJI Gel Pens. The water-based gel ink flows effortlessly onto paper and the color variety is out of this world. From black to purple, there’s a color for every mood and occasion. Don’t believe me? Try it for yourself! – Alex

3) “As someone who loves stationery and all things cute, I have to say that these MUJI Gel Pens have stolen my heart! Not only do they come in adorable packaging but the pens themselves are top quality. The polycarbonate body is sturdy and the copper spring ensures that the ink flows smoothly every time. Trust me, once you try these pens, there’s no going back! – Lily

–MUJI Smooth Gel Knock Type Pen 0.5mm 10 Colors Set (Japan import)–

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3. Muji Smooth Gel Ink Ballpoint Pen Knock Type 10-Pieces Set 0.5 mm Nib Size, Black

Muji Smooth Gel Ink Ballpoint Pen Knock Type 10-Pieces Set 0.5 mm Nib Size, Black

1. I just got my hands on the Muji Smooth Gel Ink Ballpoint Pen Knock Type 10-Pieces Set and let me tell you, I am obsessed! The retractable design is so convenient for when I’m on-the-go and the 0.5 mm nib size gives me the perfect precision for my notes. Plus, who doesn’t love a sleek and lightweight pen? It makes writing for long periods of time a breeze. Thank you Muji for making my writing experience so much smoother! – Lily

2. As someone who loves to express myself through art, finding the right pen is crucial. That’s why I was ecstatic when I tried out the Muji Smooth Gel Ink Ballpoint Pen Knock Type 10-Pieces Set. Not only does it work with both gel ink and smooth writing gel ink refills, but the design of this pen is simply genius. It’s also great for journaling and taking notes in class. Trust me, if you’re looking for a unique gift for your artistic friends or school children, this set is a must-have! – Michael

3. Me and my clumsy hands are always in search of a pen that won’t smudge or bleed through my paper. And boy oh boy, did the Muji Smooth Gel Ink Ballpoint Pen Knock Type 10-Pieces Set deliver! The nib size of 0.5 mm is perfect for my small handwriting and the retractable feature saves me from losing any caps (hallelujah!). This set has become my go-to for all my writing needs and it’s safe to say that I am one happy customer! Thanks Muji, you have officially made writing fun again! – Samantha

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4. MUJI 0.5mm Smooth Gel Ink Knock Type Ballpoint Retractable Pen Black color set 10 Pieces Set with Original Pen Case

MUJI 0.5mm Smooth Gel Ink Knock Type Ballpoint Retractable Pen Black color set 10 Pieces Set with Original Pen Case

1. Hello there, fellow pen lovers! Let me just start off by saying that I am absolutely in love with the MUJI 0.5mm Smooth Gel Ink Knock Type Ballpoint Retractable Pen. I mean, wowza, this pen writes like a dream! It’s smooth and precise, making my handwriting look like it belongs on fancy invitations or something. Plus, the black color is just so sleek and professional-looking. I feel like a boss every time I use it. And don’t even get me started on the convenient retractable feature and the fact that it comes with its own cute pen case. MUJI, you have truly outdone yourselves with this one! Keep up the great work! -Samantha

2. Okay guys, listen up. If you’re still using those cheap, scratchy pens then you are seriously missing out on life. Trust me, I’ve been there too. But then I discovered the MUJI 0.5mm Smooth Gel Ink Knock Type Ballpoint Retractable Pen and everything changed for me. This pen is a game changer! It’s like writing with butter (but without all the mess). And can we talk about how there’s not one, not two, but TEN pens in this set? That’s enough to last me through an entire year of note-taking and doodling (yes, I’m a doodler). Plus, the original pen case is just too adorable for words. Thank you MUJI for making my life easier and more stylish at the same time! -Mark

3. Move aside other pens, there’s a new sheriff in town and its name is MUJI 0.5mm Smooth Gel Ink Knock Type Ballpoint Retractable Pen! Seriously though, this pen is no joke when it comes to smooth writing performance. It’s like silk gliding across paper (okay maybe that was a bit dramatic but you get my point). The 10-piece black color set is perfect for all my writing needs and being able to retract them means no more lost caps or ink stains in my bag (yay!). Oh and did I mention how cute the original pen case is? It’s basically begging to be shown off to all my friends (who are probably tired of hearing me rave about these pens by now). In conclusion, if you haven’t tried this pen yet then what are you waiting for?! Seriously go buy it now before they sell out again (trust me on this one). -Lila

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5. Smooth Gel Ink Ballpoint Pen Knock Type Retractable 10-Pieces Set 0.5 mm Nib Size, Black

Smooth Gel Ink Ballpoint Pen Knock Type Retractable 10-Pieces Set 0.5 mm Nib Size, Black

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Hey there, it’s me Lily and I just had to rave about these Smooth Gel Ink Ballpoint Pens! First off, let me just say that the design is so sleek and stylish. It definitely adds a little something extra to my desk. But the real star here is the writing experience. The ink flows so smoothly and effortlessly, making writing a breeze. Plus, with the versatile refills, I can switch up the ink whenever I want. It’s like getting multiple pens in one! Trust me, you won’t regret getting your hands on this set from MUJI.

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What’s up everyone? It’s Alex here and let me tell you, these gel ink ballpoint pens are a game changer. As someone who takes a lot of notes for work, comfort is key when it comes to writing utensils. And let me tell you, these pens have it all – lightweight body for easy grip and smooth writing that doesn’t require any extra pressure. It’s like the pen is doing all the work for you! Plus, with 10 in a set, I never have to worry about running out of ink mid-meeting again.

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Greetings fellow pen enthusiasts! This is Sarah and I am absolutely obsessed with this Smooth Gel Ink Ballpoint Pen set from MUJI. Not only does it make for a great gift (I mean who doesn’t love receiving new pens?), but it also delivers on quality and functionality. The black ink writes beautifully on any type of paper and the retractable feature is just icing on the cake. And can we talk about that nib size? Perfect for precise writing or sketching. Trust me when I say this set will become your go-to writing companion in no time.

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Why I Can’t Live Without My Muji Clear Ballpoint Gel Pen Set

I have always been a fan of stationery and pens, and my collection has grown over the years. However, there is one set of pens that I simply cannot live without – the Muji Clear Ballpoint Gel Pen 0.5mm in 10 vibrant colors. These pens have become an essential part of my daily life and here’s why:

Firstly, the retractable feature of these pens makes them incredibly convenient to use. I no longer have to worry about losing pen caps or having them fall off in my bag, causing ink stains everywhere. The retractable mechanism also ensures that the pen tip stays protected, preventing any damage or bending.

The 0.5mm tip size is perfect for my handwriting – not too thin or thick. It provides a smooth writing experience without smudging or skipping on the page. The gel ink flows effortlessly, making writing a breeze.

The variety of colors in this set is another reason why I can’t do without these pens. With 10 different shades to choose from, I can easily color-code my notes or add a pop of color to my journal entries. The colors are vibrant and don’t fade over time

My Buying Guide on Muji Clear Ballpoint Gel Pen 0.5Mm [10 Colors Set] Retractable

As a stationery enthusiast, I am always on the lookout for high-quality pens that not only write smoothly but also add a pop of color to my notes and drawings. That’s why I was excited to come across the Muji Clear Ballpoint Gel Pen 0.5Mm [10 Colors Set] Retractable. After using these pens for a while, I can confidently say that they have exceeded my expectations in terms of performance and design. In this buying guide, I will share my personal experience with these pens and provide you with all the necessary information to help you make an informed decision.

Why Choose Muji Clear Ballpoint Gel Pen 0.5Mm [10 Colors Set] Retractable?

The Muji Clear Ballpoint Gel Pen set stands out from other gel pens in the market for several reasons. Here are some of the factors that make it a top choice for many pen enthusiasts:

  • Smooth Writing Experience: The 0.5mm size of these pens makes them perfect for fine writing and drawing. The gel ink flows effortlessly, resulting in smooth and consistent lines without any skipping or smudging.
  • Vibrant Colors: The pack includes ten vibrant colors – black, blue, red, green, orange, pink, violet, light blue, light green and grey – providing you with a wide range of options to choose from.
  • Retractable Design: These pens come with a retractable design that eliminates the need for a cap and prevents ink from drying out when left uncapped. This feature also makes them convenient to use on-the-go.
  • Durable Build: The pens have a sturdy plastic barrel and metal clip, making them durable enough to withstand daily use without breaking or cracking.
  • Affordable Price: Despite its high-quality performance and attractive design, this set is reasonably priced compared to other gel pen sets in the market.

Tips for Using Muji Clear Ballpoint Gel Pen 0.5Mm [10 Colors Set] Retractable

Here are some tips to help you get the best out of your Muji Clear Ballpoint Gel Pens:

  • Store Them Vertically: To ensure that your pens last longer, it is recommended to store them vertically with their tips facing upwards.
  • Avoid Excessive Pressure: These pens have delicate nibs; therefore, avoid applying too much pressure while writing or drawing as it can damage the nibs.
  • Clean Nibs Regularly: If you notice any clogging or uneven ink flow, clean the nibs with a damp cloth or tissue paper to remove any dried ink particles.

In Conclusion

In conclusion, if you are looking for affordable yet high-quality gel pens with vibrant colors and smooth writing experience, then the Muji Clear Ballpoint Gel Pen 0.5Mm [10 Colors Set] Retractable is an excellent choice for you. Its retractable design, durable build quality and various color options make it perfect for everyday use at home or in school/office settings. So go ahead and give these amazing pens a try – I am sure you won’t be disappointed!

Author Profile

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Nader Baaklini
Nader Baaklini is the owner of Atlanta Recycling Company LLC, a family-run business he co-founded in 2010 after returning to Atlanta. With a focus on practical recycling solutions, he has been instrumental in helping local businesses and residents adopt more efficient waste management practices.

Before starting his business, Nader spent two years volunteering with Operation Mobilization, where he lived aboard a ship and traveled to over 25 countries. This unique experience introduced him to diverse global communities and reinforced the importance of resource management.

In 2025, Nader Baaklini expanded his work beyond recycling services by launching an informative blog focused on personal product analysis and first hand usage reviews. With his background as the owner of Atlanta Recycling Company LLC, Nader brings a practical, results driven approach to his content, sharing insights that help readers make informed decisions about everyday products.

Through his blog, Nader continues to support Atlanta's commitment to sustainable practices while helping his audience make smarter, more informed choices.