I have several teeny shells that I no longer need... some of them are very nice. I had a large crab dig up one of my teenies during a molt and eat him. Now this same large is in desperate need of more shells, and some shells to fit him as he grows into his "jumbo" stage, which I feel will be soon. I've looked around at pestores and other places and none of the shells are large enough. I will swap several teenies for just one or two jumbos!