This is a Reptile Heat S size. The size is 20cm x 19.5cm according to the manufacturer's specifications. I purchased it two years ago and used it for reptile keeping, but I'm selling it now because I no longer need it. I was able to use it without any problems to keep the inside of the breeding cage warm during the winter. I will protect it with cardboard to prevent bending, wrap it in bubble wrap, and ship it via Rakuraku Mercari delivery. *There is no box or instruction manual. *If you need the instruction manual, I will print it out and include it. (Just plug it into an outlet) Please understand that this is a used item. Please check the photos for any scratches. I plan to upload reptile keeping supplies in the future when I have time, so if you purchase them together with other products, I will offer a discount to save on shipping costs. #Kanahibi (Japanese grass lizard) #Nihon Tokage (Japanese skink) #Nihon Yamori (Japanese gecko) #Leopa (Leopard gecko) #Reptiles #Amphibians