As Hermit Crabs grow, they need larger shells to change into. Always keep extra shells in their enclosure. These extra "Growth" shells should be larger than the shell your crab currently resides in.
Available in 4 sizes :
Small shell size approx 3cm (3 pack of shells)
Medium shell size approx 5cm (2 pack of shells)
Large shell size approx 7cm (1 shell per pack)
X-Large shell size 9cm (1 shell per pack)
Please note: These are natural shells so sizes and shapes vary from pack to pack with different sized openings.