I had troubles finding thimbles for years. The ones I had were to big or to little. I carried the to big ones with me very often but couldn't get used to 'em. I thought it was me. I found 3 at a thrift store. One was brass, one was steel, & one was pink plastic. All three fit. The brass one was awesome. I got so used to it that one of the times that my Dad was in the hospital& I was quilting in the waiting room, I forgot it was on & took it to the bathroom. I took it off to use the facilities & left it there. 5 min.s later it was gone. :( The steel one is great also just not the brass one. I use the steel one all the time. I don't like the pink one but yet at least it still fits. I only use it when I missplace the steel one. I went looking at the LQS & Handcock's for some new ones in case I loose these but they don't fit. Sorry for the long post I wanted to illustrate how if the thimble fits you'll use it. If not you won't.
PS. I am always looking at other thrift stores for more.