Mitsubishi Pencil UMNSP38.13 Gel Ballpoint Pen Uni-Ball One P 0.38 Momo

This little pen caught me off guard. At first, I thought the small size would be an issue, but man, it’s actually super comfortable to hold. The thicker body gives it a nice, solid feel in the hand, making it way more ergonomic than expected.The writing experience is smooth as can be, with ink that flows effortlessly and dries almost instantly—no smudging, no mess. Perfect for quick notes or extended writing sessions. The real standout feature, though? That clip. It looks like a paperclip but functions like a high-end pen clip—solid, stylish, and it even lifts to fit onto thicker materials without feeling flimsy.If you want a compact, premium-feeling pen that punches way above its weight, this one’s an easy must-have.

Easy writing. The pen glides across the paper. It is lightweight in your hand. It is refill able, and the chunky shape is easy and comfortable to hold. This is a good value. The size makes it perfect for a purse or pocket. I like the clip, and the orange color.

I gotta say, I didn’t expect to love a pen like this!My boyfriend bought this for me originally saying “this one won awards in Japan!” And I brushed it off and said thank you. But I love it so much I bought three more lol!I see why it won awards now, very smooth, no skips or blots. Comfortable to hold even though it’s a little bit thick and short. I’m going to keep buying these!

TL;DWR. The pen writes fantastically and has great ink, the body is above average in build quality and ergonomically very comfortable. However the spring isn't changeable and for me was squeaky right off the bat.The Uni-Ball One P is an interesting little pen with it's stocky design. The overall build quality is quite nice and It's no heavier or lighter than most pens; I found it quite comfortable to hold even with larger hands.The plastic body itself feels fairly premium?Definitely not cheap feeling but also not completely outstanding, with the walls of the pen being just a tad too thin for it's extra circumference, leading the barrel to have some "hollowness" to it. Which overall makes it feel less dense than you think it would. However the thicker body means it doesn't need any sort of grip or rubber to hold very comfortably.The click of the pen feels disappointingly soft and the spring is quite squeaky (more on the spring later) but the actual writing experience is very nice and the ink is incredible, outperforming my previous favorite ink from Energel. It's incredibly dark, very smooth flow and very very quick to dry (like seriously the only way I could get it to smear was inking a circle in completely and then very quickly running my finger across).The pen clip being made of metal and separate from the pen body is also very nice, it means you don't have to worry about a plastic piece that can break off as the metal would bend before it would break.Now about that spring... Well it's hidden, and not removable from what I can tell, and the same goes for the push button/thrust device. Which comes with both a pro and a con, the pro being you can't lose anything when opening the pen to change ink. The con being you can't replace the spring, period. Which I could actually see being a great thing if you're giving this to a kid who likes taking stuff apart. But if you're like me and want to be able to change the spring it's pretty unfortunate. Especially since it doesn't sound all that great out of the box, though it might be smoothed out with a little mechanical keyboard lube.Again, overall a great little pen. Very aesthetic appearance wise and also comfortable to hold. With the ink being the true hidden gem of this pen. (But I gotta dock a star for the squeaky spring)

Love this pen. It’s cute, small, fits in pocket, bag wherever. The ink is a nice black, it writes smoothly, it feels nice in the hand, and the ink doesn’t smear too badly. Recommend

The pen barrel is made of a hard plastic and has no give. I found it to be immediately uncomfortable with how thick the barrel is. It’s super cute to look at though. The ink is of course very nice and dark.

Very happy with this pen, for the price. It feels much better in my hand than the disposable pens I'm accustomed to. The parts join together very well, and it gives the impression of being seamless. The sprung paperclip is a nice touch and feels good.I've tried this .38 as well as the uniball .28. I like both, but I prefer the .38 because it is impressively fine, yet has an acceptably smooth texture. The .28 is outrageously fine and very useful for details and tiny notes, but that gives it a rough writing texture and a delicate resistance that makes it feel like a bit too much for everyday writing. I like to use this pen for normal writing, and the .28 for filling forms and things like that.

This chubby pen has been great. It is 4 1/2 " tall and fits perfectly to write. It is smooth and quick drying ink. It is very lightweight and has a Sharp point, not quite razor but very nice writing. This is easy to use and the only problem is it "slips" there is no grip at the base so it slides after you've been writing a bit. That's why I gave it 4 stars. Otherwise excellent instrument.