500x400mm external with centrally positioned window to fit an A3 image with 3:2 ratio, actual size 390x260mm. White core. Acid free. 5 sheets per pack.

Images on this site are a representation of colours available. Actual colours may vary. 

Ice White smooth 3:2 ratio A3 picture window mounts have a centrally positioned aperture in order to suit both portrait and landscape images, allowing approximately 10mm all round to attach your image to the back of the mount. As most cameras and mobile phones have an aperture ratio of 3:2 this window should minimise the need for image cropping. 

A3 3:2 Ratio aperture - 390x260mm sized window is designed to be used with A3 paper and to avoid the need for cropping when using most popular cameras, which use a 3:2 aperture ratio.  

Price is for one pack containing 5 window mounts.