Thrive Vertical Hexagon Tropical Reptile Terrarium -20 Gallon. Provide your pet reptile with the perfect habitat for climbing with the Thrive Tropical Hexagon Reptile Terrarium. This vertical, 20-gallon terrarium, measuring 19.1" L x 16.6" W x 22.4" H, is designed to encourage natural climbing behaviors and proper ventilation. It features a locking screen cover for security, cord management slots, and durable glass construction that can withstand heat bulbs. This terrarium is an ideal home for a variety of reptiles, including chameleons, crested geckos, and tree frogs.