The support are Hex shaped and are measured from corner to corner. They are used to support round, square, hex, petal, heart, and similiar shapes. Please see our diamond supports for shapes that need extra side support.
1/4" dowel rods are used for the "leg" supports. The center hole is for a 3/8" dowel.
NOTE: The 13", 16", and 18" uses 3/8" dowel rods for the supports.