What Knife You Use To Cut Leather? - Leatherworker.net
For finer detail cuts, I use an x-acto knife with either the z-line blades #11, or if the leather is a little thicker a curved scalpel type blade #10. The scalpel blades are less susceptible to bending and give a more perpendicular cut in thicker material. For thinner and strechy leather, I use a Olfa large rotary cutter.