I have the same problem. I found these, which are called "Nimble Thimble" and they have a slit that your fingernail goes through. I have a tendency to push with the side of my middle finger, and this one comes down to the first knuckle and protects the side of my finger. As with most things, the small is too tight and the medium is not tight enough, but I found that if I put a finger cot on first, the thimble fits good.
http://www.clotilde.com/detail.html?...348&cat_id=143
Originally Posted by cjomomma
I can't use a thimble due to long fingernails.