To begin, it is important to understand the basics of seahorses. Seahorses are a type of bony fish, which classifies them in the animal kingdom, phylum Chordata, and class, Osteichthyes. Seahorses are part of the family Syngnathidae, which also includes pipefish and sea dragons (Boschung 530 and Moore 1).
Fat Quarter Bundles. Fat Quarter Bundles are collections of fat quarters from a fabric line. Fat Quarters are quarter-yard cuts of fabric cut wide (hence the name fat). Their approximate size is 18 x 21.
Fastener manufacturers identify the size of a metric fastener differently than an SAE fastener. As an example, a metric fastener size is: M12 x 2. This means that the major diameter of the threads is 12 mm and that the thread pitch is 2 mm (there are 2 mm between threads).