I have a Clover. It has an open end and is adjustable. Well, actually, I probably have 4 or 5 of them. I really like them because they have a lip and if my finger swells, I can make them a little bigger or not. If my nails get a little long it won't bother the thimble since the end is open. I've seen them recently in the catalogs for about $10 or $11 but I wouldn't be without it.