Add a sophisticated touch to your artwork with our high-quality linen mats. The natural texture of linen provides a subtle yet striking accent. 40x50 External dimensions: 40x50 cm (suitable for frames of this size) Internal dimensions: For a 10x15 cm photo 30x40 is a 10x15 photo also a nice internal size. 20x30 For other formats, such as a 20x30 cm passe-partout, a 6x9 cm photo or Polaroid format (54 mm x 86 mm) are nice choices. Customization: All passe-partouts are custom cut. After your order I will contact you to coordinate the exact inner size, so that it fits perfectly with your photo, artwork, Polaroid or photo strip. Important: The outer dimensions of the passe-partout are the size you order, and therefore the size of your frame. Are you unsure about the size of your frame? Then measure the glass size to be sure. Do you also want the photo printed immediately? This is possible for an additional fee, both in color and black and white. Do you have questions about specific colors or want to know all the options? Feel free to send me a message, I'm happy to help you!