Reptile Habitat, Terrarium Background, Cool Desert Sky + SIDES - 12" Tall X 54" Wide Good for 20L & more. Go to amazon.com Related posts Best terrarium background 20l for 2022 FeatureTear Resistant UV PrintScratch ResistantWater ResistantRealistic LookTapes to back from the outside. DescriptionSize is 12" H x 54" Long. Will cover the back and sides of a tank that is 30" long and 12" deep.