Material: made of high quality acrylic material,shatterproof,very robust,clear color in both sides. Size: Outside dimensions approx. 4 x 5.5 cm,inside dimensions 3.2 x 4.6 cm,suitable for a photo length of less than 3.2 cm and a width of less than 4.6 cm.The package includes: 25 pieces picture frame key chain. Also among the most popular photo gift ideas that can avoid the loss of keys with a keychain,also very handy to set phone number,photo or message. Personalized design,UV resistant,durable and durable,and not easy to break.Clear in both sides,convenient to look through for the photo. Broad application: for companies to promote,take school photo and give as gifts,could also use to put phone number to avoid the loss of keys.