“Layer Cakes” is a name given to pre-cut squares that are 10 inch x 10 inch. They are often bundled in packages of 40-42. Originally part of the Moda Fabric pre-cut collections, the term layer cakes is used to describe a stack of 10 inch squares. You can cut these yourself, purchase a pack of all one color or a fabric line collection.
Today there are many patterns on the market that call for layer cakes. Often these patterns are perfect for the beginner as they take away the pressure of choosing fabrics. (Layer Cakes usually include coordinating fabrics.). Also, the square is a great shape to use in your first quilt.
Also see: Pre-cuts