5 mm for details

and comes with a replaceable 8 mm round tip and mixing balls to keep your colors consistent

but you can also just mix the colours however you like

the Markal Paintstik B Jumbo is the perfect tool

even under museum lighting

on the run otr 004 ink squeeze marker 12 mm Idwrap 5 mm for detailsThe On The Run OTR. 004 Ink Squeeze Marker 12 mm features a durable, long haired 12 mm felt tip and 75 ml of alcohol based permanent ink. Designed for both indoor and outdoor use, it delivers smooth, consistent lines and broad coverage. Its replaceable tip and sturdy construction make it a reliable tool for artists. Available in seven colors.