What size enclosure does my reptile need?
The old pet store advice (a 20 gallon for a leopard gecko, a 40 for a bearded dragon) has been replaced. Here are the adult minimums keepers use now.
Adult minimums, length x depth x height
- Leopard gecko: 36 x 18 x 18 in minimum, 48 x 24 x 24 in recommended
- Bearded dragon: 48 x 24 x 24 in minimum, 72 x 24 x 24 in recommended
- Ball python: 48 x 24 x 24 in minimum, 72 x 24 x 24 in recommended
- Corn snake: 48 x 24 x 24 in minimum, 72 x 24 x 24 in recommended
- Crested gecko: 18 x 18 x 24 in minimum, 24 x 18 x 36 in recommended
- Blue tongue skink: 48 x 24 x 24 in minimum, 72 x 24 x 24 in recommended
- Western hognose snake: 36 x 18 x 18 in minimum, 48 x 24 x 24 in recommended
- Gargoyle gecko: 18 x 18 x 24 in minimum, 24 x 18 x 36 in recommended
- Veiled chameleon: 24 x 24 x 48 in minimum, 36 x 24 x 48 in recommended
- Russian tortoise: 48 x 24 x 12 in minimum, 72 x 36 x 16 in recommended
- Boa constrictor: 72 x 24 x 24 in minimum, 72 x 36 x 36 in recommended
- California kingsnake: 48 x 24 x 24 in minimum, 48 x 24 x 24 in recommended
- Milk snake: 48 x 24 x 24 in minimum, 48 x 24 x 24 in recommended
- Uromastyx: 48 x 24 x 24 in minimum, 72 x 24 x 24 in recommended
- Argentine tegu: 96 x 48 x 48 in minimum, 96 x 48 x 48 in recommended
- Pacman frog: 18 x 18 x 12 in minimum, 24 x 18 x 12 in recommended
- White's tree frog: 18 x 18 x 24 in minimum, 24 x 18 x 36 in recommended
- African fat-tailed gecko: 36 x 18 x 18 in minimum, 48 x 24 x 24 in recommended
Why bigger
A bigger enclosure is not only more room. It is a longer gradient from the hot basking spot to the cool side, so the animal can choose its own temperature, and a UVB gradient from bright to shade. A small tank gets hot all the way through.
Height for climbers
Arboreal species (crested and gargoyle geckos, chameleons, tree frogs) use height more than floor: an 18 x 18 x 24 is a minimum for one adult crested gecko.
Enter your enclosure in the planner for a verdict for your species, then the plan to set it up.