Model No:	Line Width (mm)	Ideal Use Case
003	0.15 mm	Ultra-fine detailing and hairlines
005	0.20 mm	Fine technical drawing and cross-hatching
01	0.25 mm	General illustration and sketching
02	0.30 mm	Handwriting and outlining
03	0.35 mm	Bold outlines and journaling
04	0.40 mm	Comic art and scrapbooking
05	0.45 mm	General-purpose writing
08	0.50 mm	Broad strokes and Zentangle
10 / 12	0.60 mm / 0.70 mm	Bold graphic work and titles