OCTAGON SHAPE: 37.5inches/95centimeters diameter, inside is reflect silver. It can minimize light loss and maximize light spread to achieving better performance for tight shot; Note: Light Stand, Bracket and Flash are NOT Included UMBRELLA SOFTBOX: It is a soft box when being spread and like an umbrella when being folded, easy to use PREMIUM MATERIAL: The umbrella softbox body is made of high-density nylon material, high reflective, no light leakage, softer lighting; Suitable for both professional and amateur use to get ideal pictures EASY TO USE AND CARRY: Comes with carrying bag, Portable and foldable, easy to take with travel. Lightweight and easy to install COMPATIBILITY: It can be used with speedlite flashes and some studio flash lights with umbrella hole