Pieces 15x21 cm - 3 pieces 13x18 cm - 4 pieces 10x15cm size photo frame set frames are made of hard resin, polyresin. it is tough and durable. we use anti-reflective, non-glare plastic pet glass as front protection. there is 3mm raw mdf as the back cover. thanks to the flexible nails, the picture can be easily changed when desired. there is an adjustable saw hanger. nails are sent to hang on the wall. free shipping.,this product can be ordered up to 9 pieces. 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.