Size Range - Nature hermit crab shells' size ranges from 1.5''-3.5'', situable for almost hermit crabs including infant, adolencent and adult crabs. All the Hermit Crab Shells are in well-package to make it a great gift for friends or family and deliver super surprises in Christmas, Birthday, Anniversary, etc. Not all the shells are the same as the picture. But the similar size and type! If you mind it, please consider to order. Appreciate it. Six Different Type Shells - Whether one size shell is enough for hermit crabs living? No!!! Hermit crabs choose the conch shell according to their size and skin color at different times. Therefore, it is significnat to prepare various seashells for your hermit crab. Petawi six different color-sized shells are available for your hermit crab selection. No Painted Natural seashells - Petawi crab shells come from natural sea shells that is hand-polished, totally safe and premium durable. Beautiful seashell is an nature gift from ocean and also indispensable supplies for hermit crabs. Warmly Tips: It is dangerous and harmful to use painted even glazed shells for your pets, which is potentially toxic to hermit crabs.