Stretchy Spandex Wedding Arch Cover – The Spandex Arch Backdrop Cover are Thick Stretchy Fabric. not see-through at all. Very elastic Wrinkle Free. This white stretch fabric arch cover includes 6FT and 7.2FT. 7.2ft white arch backdrop cover size: 7.2 ft(H)x4 ft(W), 6ft white arch cover size: 6 ft(H)x2.6 ft(W).