Specification:
Origin: Mainland China
Material: Wood
Size:
S:
Outside Diameter:15cm/5.91in
Inside Diameter: 14.4cm/5.67in 
Base Width: 9cm/3.54in
Overall Height: 17.5cm/6.89in
Running Wheel Outer Width: 6cm/2.36in, Inner Width: 5.3cm/2.09in
Suitable For Small Mice Such As Hamsters, Three-Wire, Silver Fox, Dwarf, In-Laws, Etc.
M:
Outer Diameter: 21cm/8.27in
Inner Diameter: 19.2cm/7.56in
Base Width: 12cm/4.72in
Overall Height: 23.5m/9.25in
Running Wheel Outer Width: 8cm/3.15in, The Inner Width Is 7.2cm/2.83in, 
Suitable For Shih Tzu Bear, Tiger Bear, Golden Squirrel, Big White Mouse, Juvenile Chinchilla, Juvenile Mini Hedgehog, Honey-Pocketed Mole, Etc.
L:
Outer Diameter: 29cm/11.42in
Inner Diameter: 28cm/11.02in 
Base Width: 14cm/5.51in
Overall Height: 32cm/12.6in
Running Wheel Outer Width 9.5cm/3.74in, Inner Width 8.6cm/3.39in

Note:
Please buy a larger model to protect the spine.
Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
Please allow 1-3mm measuring deviation due to manual measurement.

1 x Hamster Roller Wheel