First of all numbers: The missing unfortunately half here. 30cm x 40cm, the exterior dimensions - the vote. Inside dimensions (the interest): missing here. 20cm x 30cm would be logical. According hama.de and packaging 20cm x 28cm - is wrong. There are 19,4cm x 27,3cm. The expensive printed / developed pictures to cut enjoy ...
Also one should not think that there is a framework here. Basically it's just a square piece of snow-white (that's right again) thick cardboard. The not as great as it would be useful and also not as great as indicated. And then also for above. 3