FLORACRAFT-Dry Styrofoam. This is the perfect base for all floral and craft projects. It is available in a variety of durable pre-cut shapes and sizes to meet any design need. This package contains two 3-3/4x2-5/8in green blocks. Made in USA. FLORACRAFT-Dry Styrofoam. This is the perfect base for all floral and craft projects. It is available in a variety of durable pre-cut shapes and sizes to meet any design need. This package contains two 3-3.