The photos that fit in the Polaroid photo albums must have the format of the i-Type, 600 or SX-70 Instantphotos. Here are the exact dimensions: - Format: 107mm x 88mm (image area: 79mm x 79mm). This corresponds to the standard dimensions for Polaroid i-Type, 600 and SX-70 Instantphotos.

This is the smaller version and the large version can be found here: https://www.galaxus.ch/de/s14/product/polaroid-i-type-fotoalbum-20747478