Our multi-aperture range is made from a foil-wrapped MDF complete with glass, backing board and mount. The frame sizes refer to the glass size not the overall size, and your image size should correspond to the image size within the mount. Mounts are cut from acid-free core mount board with a small overlap to position your image behind. The frame moulding measures 20mm wide and 15mm deep. Frames can be used in portrait and landscape.