I personally hand sculpted these, with no molds. These stitch markers are made from polymer clay, baked for hardness & durability with a protective glaze applied. They look similar but no two are alike! The sharks are approx. 1" tall. This set fits up to a size 7 US knitting needle (4.5 mm). They come on their pin stitch marker holder. Plenty of room for more markers from your collection.