This is a picture frame suitable for greeting cards, postcards, etc. The size is approximately 22.5 x 25.7 x 5.0 cm, the inner thickness is about 3.8 cm, the window size is about 10.4 x 13.6 cm, and the backboard is about 20 x 23.2 cm. It comes with a paper divider to place around the picture and a string for hanging. There is a stain on the back of the mat (photos 5 and 6). Please refrain from purchasing if you are concerned about this. If you would like to purchase multiple items, please let me know in the comments before purchasing. Thank you very much. #Interior #Present #Celebration #HousewarmingGift #ChristmasPresent #Shadowbox #ArtFlower #PictureFrame #GreetingCard