This is a Matthews 8 x 8', grommeted 1/4 Silent Gridcloth, to fit any Matthews or other brand or make of frame. 8 x 8' Butterflies measure approximately 7.8 x 7.8'.
Matthews fabrics are tested for even light distribution in a black chamber with an incandescent light source at one end and the fabric positioned 2/3 of the way between the source and the digital light meter. This gridcloth provides slight diffusion and minimal light loss.