Pegboards are designed especially to fit the HAMA® Beads, each board has a series of pegs 4mm (approx) high spaced at the correct distance for the midi beads. When the beads are placed on the board and then ironed, the beads can fuse together to make dimentional objects. Pack contains 2 boards; a large square board (145mm x 145mm) and a large round board (155mm diameter ).