They're made using a 0.4 millimeter crochet hook, the smallest of the crocheting tools out there. Needless to say, this probably requires extremely steady hands and some pretty good eyesight.
Besides these incredibly small versions, Su Ami also creates slightly larger versions that can reach several inches in height. Compared to the miniatures, these larger creations are absolutely huge. While the larger variations are stuffed, these are so tiny that they don't need to be.
The name Su Ami comes from the youngest member of this artistic family, who, at age 10, is a huge fan of all things cute. The 10-year-old is especially interested in the Japanese craft of amigurumi, or crocheted dolls in the shape of animals. Su Ami is her nickname, and her love for the cute crafts inspired the whole family to take up the crochet hooks.