Golden State Art, Pack of 25, Acid-Free White Pre-Cut 5x7 Picture Mat for 4x6 Photo with White Core Bevel Cut Frame Mattes Set of High Quality, Acid-Free Single Mats, Color: White Package Includes: 25 White 5x7 Picture Frame Mats Only Mat Inner/Opening size is 3.5" x 5.5" inches for 4x6 Pictures Mats are white core, beveled cut, and are 4-ply thick (1.4 mm or 1/16 inch) Can be use for framing pictures. Improve your photos and artwork. Great for hobbies to art gallery exhibits.