Thank you for viewing. This is a frame for shadow boxes and postcards, but it can also be used for greeting cards, art flowers, collection boxes, and more. The size is approximately 23.1 x 18.8 x 3.6 cm, the backboard is approximately 20.2 x 15.9 cm, the height of the inner board supporting the mat (inner thickness) is approximately 1.8 cm, and the size of the mat window is approximately 14.3 x 9.3 cm. It has an integrated design without a base, creating a clean look. Hanging hardware and string are included separately, so please attach them according to the orientation you wish to use. If you would like to purchase multiple items, please let us know in the comments before purchasing. #Shadowbox #Decoupage #3DArt #Interior #Present #Christmas #BulkPurchaseWelcome #Frame #Wooden