This is a 33inch / 83cm studio umbrella With the translucent layer, light can easily reflected to the product from the studio flash The translucent umbrella helps to reduce shadows and produce an even, soft, low contrast light over a relatively large area Soften, broaden and diffuse the light output of any tungsten or studio flash source Its light weight, easy to use and assemble makes it be ideal for both portraits and group shots or shooting on large object.