I've never sewn on leather but Helen's book recommends: For soft leather, use a sharp needle, the smallest you can (switch to ball point if you get too many thread breaks). For hard leather, use a ball point. Use a 70/10 for light leather, 75/11 for mid-weight and 80/12 for heavy. Synthetic thread (e.g. polyester) is good as the acid used in tanning can compromise natural fibers. You can use #40-weight but #30 will allow use of less density (fewer needle holes). Use tearaway backing, wrap hoop prior to hooping or go hoop-less. There is alot more....you can call me and I'll read it to you if you'd like. Dorothy Compton Bee Embroidered _www.BeeEmbroidered.com_ (http://www.beeembroidered.com/) (916) 635-7467 Rancho Cordova, CA In a message dated 4/29/2005 11:43:19 AM Pacific Daylight Time, adams3910@xxxxxxxxxx writes: I have my first encounter with leather and am not sure what precautions I should take----needle size, sharp vs ball? Any suggestions? Thanks Jeanne Adams Sports Etc