Matthews manufactures 3.66 m x 3.66 m (12' x 12') overheads with the best fabric available on the market today. Consult our fabric specifications page for a quick overview of the usefulness of each fabric. Matthews 3.66 m x 3.66 m (12' x 12') overheads are sized according to the industry's approximate standard measurement of 3.56 m x 3.56 m (11'8" x 11'8"). All fabrics are tested in a darkroom with an incandescent light source at one end and the fabric positioned at 2/3 of the distance between the source and the digital photometer. All Matthews Checkerboard products are cut and sewn with precision unmatched in the industry today. Overhead sets include a Single Scrim, a Double Scrim, an Artificial Silk and a Solid; a storage bag and a frame.