Size: the size of each cardboard picture frame is 4.7 x 7.0inch/12.1cm x 17.8cm in outer size, 3.4 x 5.1inch/8.8cm x 13cm in window size, suitable for paper size range from 3.4 x 5.1inch to 4.1 x 6.1inch Application: our diy picture frames are suitable for 4 x 6inch photos, postcards, oil paintings, pencil drawings, watercolors, menus, invitation cards, etc. Perfect as a gift or keepsake for home, school, , wedding, birthday, , commencement, graduation, thanksgiving, halloween, christmas Material: our photo frame is made of three layers of thick white paper so it may be a little tight when inserting photos. classic design, can be reused for a long time Package quantity: you get 30 pack white blank picture frames, the photo frame can be placed horizontally or vertically to meet your different needs Features: you can decorate blank photo frames with paint, stickers, ribbons and more to make them more