Regarding the re-mortgage the house to buy a canvas comment, well, each one of these little beauties costs 3.50 francs about USD 3.00 which when you think it's only 2x2" it's quite a price! understandably I was very excited to find a pack of 4 priced at 6.80CHF. Unfortunately, I managed to break one of them when I tried to hammer one of the tacks in, I didn't realise there were 4 metal corners set into the frame until I flipped it over. After looking a bit closer I realised the cheaper ones don't have the metal bits, double result!!