Multiple Sizes: There are 4 different sizes of hermit crab shells, ranging from 1.5"-3.3" in size, and the opening size is 0.6"-1.9". Each shell is hand-forged by professional personnel at high temperature quenching, and a variety of sizes are available within this range to ensure the perfect fit for your hermit crab.Perfect Art: These shells are designed for hermit crabs. The entire shell is completely transparent, allowing you to observe every part of the hermit crab. You can observe that they use their tentacles to massage their body parts when they rest. The glass layer is insulated, allowing them to find the most suitable and comfortable shell and feel like they are at home.Multi-functional Use: In addition to being a shell for hermit crabs, these shells are also a kind of handicraft, which is very suitable for communication or display on your desk, study, DIY project, aquarium decoration or beach theme display.Unique Art: Each shell is hand-forged by high-temperature glass, and the size will vary, so their shapes are unique.If the glass product you received is damaged during transportation, please contact us by email and we will be happy to exchange or refund you