Glass is used in the frames. picture size: 20cm x 20cm (inner measure) frame size: 23cm x 23cm (outer size) frame width: 2cm. frame thickness: 1.5 cm. maximum 9 pieces of this product can be ordered. swordslife reserves the right to cancel orders over 9 units. more than 100 stocks are offered to be sold at the campaign price. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.