Matthews manufactures 3.65 x 3.65 m diffusion frames with the finest fabric available on the market today. Check our fabric specifications page for a quick overview of what each fabric is useful for. Matthews' 3.65 x 3.65 m frames are sized to the approximate industry standard of 3.56 x 3.56 m. All fabrics are tested in a dark chamber with an incandescent light source at one end and the fabric positioned 2/3 of the distance between the source and the digital light meter. All Matthews Checkerboard products are cut and sewn with unmatched precision in the industry today. Diffusion frame sets include single fabric, double fabric, artificial silk and full fabric; a storage bag and frame.