For now, we will only do custom size doors by request. If you have a custom door that is not a standard 36x80, 36x96, 30/32x80 then please call us at (800) 604-3780 and ask us to give you a custom quote. For everyone that has a standard door size of 36x80, 36x96 or 30/32x80 you simply measure your door and then choose the correct size under the drop down when you place your order for the product that you want - see picture below. Because the DoorFotos are made out of a polyester/spandex blend they do have a little stretch so don't worry if you door is not exactly 36x80, 36x96, 30/32x80 as there is about 1" leeway in each direction. so if your door measures 35x79 or 33x80 then your DoorFoto will fit just fine.