Perfect for easily adding guide and slant
lines to any paper. Ruler lets you choose from
guides at 4mm and 5mm x-heights with 3:2:3
ratio, and 6.5mm x-height at 1:1:1 ratio.
Complete with both 55 and 52 degree slants
and center marks for A2, A6, A7, and A9
envelopes. Every calligraphers dream!