I use a Thimblelady thimble
http://www.thimblelady.com. I initially tried the plastic one to see if I liked the design/fit. Loved both features. I'm now on my second stainless steel one (wore holes in a couple of the dimples). The dimples are nice and deep and pushing with the pad of my finger vs the top is more comfortable for me. I think the sizing directions on her site are great. I'm hesitant to spend the $$ on a really pretty sterling silver one (either thimblelady or Roxanne or TJ Lane) as sterling is a softer metal than stainless steel. If I can wear holes in the stainless after a few years, I'd hate to think how quickly I'd do that to a sterling one! I hand quilt almost exclusively and will go on binges of quilting from several hours a day to going months at a time doing none. Depends on the projects I have going at any given time. Right now I'm quilting my fingers off trying to get a quilt done for mid-Feb. I think I'll make it!