These are a set of brooches that fit together. They are 33 by 33mm. They can be worn seperately but if they are worn together the images fit into one another. I really like the idea of 2 pieces making up one image, so in the future I would like to make a whole puzzle (about A4) that makes up 1 image. I would probably choose quite a bright colourful image so that each puzzle piece will still look good by itself, but is actually part of a whole puzzle.