Enclosure size guide
Minimum and recommended enclosure sizes for adult reptiles.
Minimum
4 ft × 2 ft × 2 ft
≈ 120 gallons
Recommended
6 ft × 2 ft × 2 ft
≈ 180 gallons
Length × width × height. Large females do best in 6 ft.
Why bigger is better
Modern husbandry favours enclosures large enough for a proper temperature gradient, room to stretch out and climb, and enough hides and clutter that animals feel secure. A common rule of thumb for terrestrial snakes is an enclosure at least as long as the snake; arboreal species like crested geckos and carpet pythons need height more than floor space.
Babies and juveniles can start smaller and move up as they grow, but an adult-sized enclosure that is well furnished with hides is fine from the start for most species. Gallon figures are approximate and assume a rectangular enclosure.
General guidance from common keeping practice, not veterinary advice. Individual animals vary; when in doubt, ask a reptile vet.
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