i print for a living and rarely use narrower rolls, as I either tile smaller prints into larger rolls to print or use the excess as sheet canvas, which can be for mid-size prints or proofs. I find that I can use 36" wide canvas for the majority of my printing, although obviously prints wider than 36" in the short direction require 44" canvas. If I have a lot of prints that fit best on 24" canvas I will use that, but the 36" canvas seems to be the most used middle of the road size for me.