I have thimbles in two different display cases that have been given to me through the years. They are so very fun to collect. Some of these are pieces are from women are long gone now. My aunts, grandmother, hubby's grandmother, two of my best friends and their mothers, sisters (still alive), some from trips taken. Some are from second hand and antique stores too. I use a thimble that has a ridge around the top mostly. Not all the time, it depends on the project.
I will have to say this to anyone beginning to wear one. You have to get used to a thimble. It isn't something that right away you feel comfortable wearing.