20Pcs Assorted-Sized Shells - One-size seashell is not enough for hermit crab living!!! Hermit crabs choose the conch shells according to their size and skin color at different times. Therefore, it is necessary to prepare various seashells for your hermit crab. Petawi 20 different color-sized shells are available for your hermit crab selection. And the colorful conches able to create a romantic world for your hermit crab. Shells Opening Size Range - Nature hermit crab shells' opening size ranges from 0.5''-2.1'', available for large, medium, small hermit crab shells, situable for almost hermit crabs including infant, adolencent and adult crabs. All the Hermit Crab Shells are in well-packaged bubble to make it a great gift for friends or family and deliver super surprises in Christmas, Birthday, Anniversary, etc. 20 different type shells are available for your hermit crab selection. No Painted Natural Safe Shells - Petawi hermit crab shells come from natural sea shells which is hand-polished, totally safe and premium durable. Beautiful seashell is an nature gift from ocean and also indispensable supplies for hermit crabs. Never use painted shells for your hermit crab! Warmly Tips: It is dangerous and harmful to use painted even glazed shells for your pets, which is potentially toxic to hermit crabs.