I have always had issues with the thimbles not fitting, this one is sort of one sided as well so especially if you have long nails, it sits behind it. not in it, with it being adjustable it will pretty much fit any finger, they do come in different sizes as well, I found it at Wal-Mart My mom even liked it when she was here, I don't do a lot of hand work so when I do I am kind of inept at it, and it still works for me.