This southwestern scenic background is sized to wraparound 3 sides of a 20L or our Custom Cages Terrarium, 20L Medium-Plus 30Lx12Dx12H. Measures 10.1875”(H) x 54.375”(L). Printed on moisture-resistant, UV-resistant, PVC material. If your terrarium is NOT by Carolina Custom Cages, COMPARE dimensions; it may fit adequately or just need some trimming. Simply attach to the outside of your terrarium with clear adhesive tape. Instructional video on YouTube at https://www.youtube.com/watch?v=krnxGThtMpE Backgrounds specifically sized for a 20L or our 30Lx12Dx12H terrarium model are listed on this page of our Amazon Storefront: https://www.amazon.com/stores/page/9F8DB02D-1D67-43C7-AAF8-6135EA615824 MANY MORE BACKGROUNDS listed on our Amazon Storefront; Habitat Backgrounds pull-down menu for different sized groups: https://www.amazon.com/stores/page/A7B7232A-D106-42EC-A3E7-8BE30F9F3B86 Probably most important is our customer service and years of experience; actually having various reptiles of our own and breeding bearded dragons. Quick email responses; specific to your questions about assembly and setup. We are here in the US, communicating with intelligible English. We also offer a practical approach to “customizing” your terrarium habitat with effective lighting fixtures, aesthetic 3-sided backgrounds, larger habitat accessories and practical reptile carpet. Terrariums are listed on our Amazon Storefront: https://www.amazon.com/stores/page/9439C25F-D6BE-4ABA-A7C2-1E15E31018D1 MODELS: 24Lx18Dx18H, 24Lx18Dx24H, 24Lx18Dx36H, 30Lx12Dx12H, 36Lx18Dx18H, 36Lx18Dx24H, 36Lx18Dx36H, 36Lx24Dx18H, 36Lx24Dx24H, 48Lx18Dx18H, 48Lx18Dx24H, 48Lx18Dx36H, 48Lx24Dx18H, 48Lx24Dx24H, 60Lx24Dx24H, 72Lx24Dx18H, 72Lx24Dx24H, 72Lx24Dx36H, Bio Deep 24Lx18Dx30H, Bio Deep 36Lx18Dx36H, Bio Deep 48Lx24Dx36H, Bio Deep Hybrid 18Lx18Dx42H, Bio Deep Hybrid 24Lx24Dx48H. Lighting fixtures, tubes and bulbs are listed on our Amazon Storefront - Lighting & Heating pull-down menu for different groups: https://www.amazon.com/stores/page/A7B7232A-D106-42EC-A3E7-8BE30F9F3B86 The light fixture specifically designed for the 30Lx12Dx12H terrarium model - Reptile 12" T5HO UVB + Single GU10 Basking Light Fixture listed here: https://www.amazon.com/dp/B07JM8CTSM Discounted from Amazon handling, bundled with 10.0 UVB listed here: https://www.amazon.com/dp/B0C172827C This southwestern scenic background is sized to wraparound 3 sides of a 20L or our 20L Medium-Plus 30Lx12Dx12H model glass terrarium. It measures 10.1875”(H) x 54.375”(L). The background is printed on moisture-resistant, UV-resistant, PVC material. Just use clear adhesive tape to attach to the outside of your terrarium; both sides and back. Carolina Custom Cages is a division of Carolina Designer Dragons, Inc.