The Sponge on Stick is perfect for sponging glaze and underglaze, this 5-piece set features manageable-sized handles (2 – 2.5 in. long) for use in small places. (5) different sized round sponge heads are firmly glued into place. Approx. sponge sizes: 1.5 in, 1 in, .75 in, .5 in and .25 in. diameter.