Black 13"x19" or 11"x17" engineered wood frame with plexiglass, or smaller 8"x12" thin-frame (plastic) plexiglass - perfect for our rectangular pieces that don't fit in the square art shown on the main home page. Your choice of paper. 13"x19" may be matted to 11"x17", 11"x17" may be matted to 8"x12" and 8"x12" may be matted to 5.5"x7.5".