Hadera Premium Sponges are extremely durable and will not tear or rip with normal use. Their unique pore structure enables them to hold twenty five times their weight in water, create a rich sudsy lather and rinse clean easily. They are truly an excellent sponge for practically any application. Additionally, they can be cleaned in a washing machine or dishwasher, can be boiled to sterilize and are inert to most cleaning chemicals. The Hadera Premium Round Tack Sponge measures approximatly 4" in diameter and 2" thick. The top of the sponge is buffed round to fit well in the hand.