Shatterproof acrylic coasters with anti-slip feet (see photo). Heat resistant up to 80 degrees. Wipe clean with a damp micro cloth (Do not use abrasives or knives). This Acrylic Product Is Environmentally Friendly & 100% Recyclable. Coaster Overall Size: 100 mm. All measurements are at longest points, the shape is cut out of the overall size. Cut from 3 mm thick acrylic. All products are supplied with a protective covering, which needs to be removed before use. Please select required colour and set size from the drop down list.