This is for a lot of 5 very nice shells - I am a shell hoarder not an expert. I buy them because I love them. My collection is getting a bit overwhelming so I'm parting with a few. The largest darker brown measures just a tad over 5" across the bottom. That one weighs 10.5 ounces. The smallest brownish pink measures a wee 2" and weighs 1/8 ounce. Their all in mint condition - source their from - well pretty sure they didn't all come from the same place and I won't guess. If your looking at this listing your probably much better informed than I.