Ok, i'm not normally a big fan of tonna shells, but I couldn't pass up this price: $8.99 for 40! The shell openings range from 7/8" to 1-1/4", approximately. Like it says in their ad, these are natural, non-perfect shells. A couple of mine even have barnacles on them! Very kewl. Out of the 40, only 6 had holes of any kind in them, and of those, only 1 is really unusable. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5319698956&rd=1&sspagename=STRK%3AMEWN%3AIT&rd=1 I also ordered 100 land snail shells from them for $9.99. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=4838&item=5321127515&tc=photo I figured even if they're not MY favorite types of shells, I should have some variety in stock for those hard-to-house hermies...and I won't feel guilty about spending $20 on 140 shells, that's for sure.