5-Star Photo Review of Uni-ball ONE Gel Pen Set

I bought a small Japanese notebook that needs a small mm pen. I'm glad to find this pack of colourful pens on Amazon. The first line on the left is a regular pen compared to this 0.38mm black pen and green pen. The difference is subtle. Below, I swatched all the colours. Another thing I like about this product is the packaging. At the bottom of it, it has the colours where the pen belongs. I really like that as I try to put them all in their original spot.