All are 0.5mm. Tom and Jerry is red. The other 3 are black. The cute gradient patterns of Kiki & Lala and Hello Kitty are limited to Sanrio Puroland, and I think they are hard to get. The pens themselves are unused and still have the resin balls, but there is no packaging. I am not considering selling them individually. I may cancel the listing due to circumstances. Thank you! ♡ #Sanrio #Sarasa #TomAndJerry #KikiAndLala #HelloKitty #BundleSale #WritingInstruments