Each cork-back coaster in this 4 set is a perfect match for your favorite mug! Create a homey feel while protecting your coffee table or nightstand from mug stains and moisture. The coaster is waterproof and heat-resistant, designed to last a long time. Buy it for yourself or as a lovely gift for your friends and family. • Hardboard MDF 0.12″ (3 mm) • Cork 0.04″ (1 mm) • High-gloss coating on top • Set of 4 - size: 3.74″ × 3.74″ × 0.16″ (95 × 95 × 4 mm) • Rounded corners • Water-repellent, heat-resistant, and non-slip • Easy to clean