Floracraft Styrofoam is perfect for floral designing with silk and dried flowers, and it is a great base for all floral and craft projects. It is a lightweight material that is great to use for sculpture and craft projects, and it is easy to work with, paint, and decorate. If you are using glue on the styrofoam test it first. Glues with a high solvent content may melt the styrofoam. Ball 2.5-4 Assorted 6pc White- Includes one 4, two 3 and three 2.5 balls.