S length 40 width 15 height 10 (cm) weighs about 120g, suitable for chinchillas squirrels small pets.

M length 55 width 20 height 15 (cm) weighs about 180g, suitable for pets under 2.5kg.

L length 65 width 25 height 18 (cm) weighs about 250g, suitable for pets under 5kg.

XL length 88 width 30 height 20 (cm) weighs about 350g, suitable for pets under 10kg.