I have used a thimble for many years, but like others had a hard time finding one to fit. I have scar tissue on my middle finger which alters the shape and shape of the finger. What works for me to make a metal thimble fit my finger and be comfortable is tape. I use the bandage tape that is quite soft, not adhesive tape, and stick it to the inside of the thimble. It pads the edge so it won't make my finger sore and adjusts the fit around the top edge to keep it from falling off. Some times I forget I am wearing it and have even started to clean house with it on until I hear the click when I pick up a broom.