From my original artwork, these coasters are made through a heat process applied it to these neoprene coasters. The image is on the coaster is permanent & will not come off when cleaned. Coasters can also be used a trivet for hot dishes. The set includes four coasters, one of each design & measure 3.5 to 4 inches in diameter. 4 Coaster Set Whimsical Southern Seafood Cuisine From Original Artwork