Frame your finished 4" x 4" needlepoint canvas into this shadowbox frame. Shadow box frame outer size: 8.42 x 8.42 x 1.73 inches (21.4 x 21.4 x 4.4 cm) The included Mat has a 4"x4" opening for your 4"x4" finished Needlepoint Frame inner depth: 3 cm (1.18 inches). Shadowbox picture frame can be displayed: on your wall, desk or tabletop clear and translucent high-definition glass, the frame's white finish is both moisture-proof and water proof