I just bought a shell, and the opening size ended up being a little over 2 inches (instead of the 1-1½ inches that it was advertised as). My largest hermit needs only a 1½ inch opening, so it's useless to me, at least for a long time. I paid $7, so it feels like a bit of a waste considering he's been scouting the smaller ones lately and I have none for his size. I'll trade for some large shells at 1½ inches (or close to) if anybody wants. I'm willing to straight out buy, too. I only want natural shells, nothing polished, banded, etc.