The Wafer Rectangle RECTANGLE is a 3:4 proportioned diffusion bank for general use. This standard broad "window" is a classic portrait and product light used just off-camera or overhead on a boom. 39.5 x 29.5 by 14" deep (100 x 75 by 35cm deep). The single most useful size and shape. 3/4 portraits, small groups and product illustration the single most popular choice.