You receive 24 pieces of MDF cork-backed coasters, measuring approximately 3.93 x 3.93 x 0.15 inches (10 x 10 x 0.4 cm), providing ample quantity for daily use and replacement. These square coasters are made of high-quality medium-density fiberboard (MDF) with a non-slip cork backing. MDF is durable, resistant to warping and impact, has low thermal conductivity, and offers good insulation and water resistance. The sublimation surface allows for vibrant, clear image transfer with a slight reflective finish. Made from eco-friendly, odorless materials for safe, confident use. These coasters are designed for sublimation printing. To use: peel off the protective film, apply your printed image using heat-resistant tape, press at 355–375°F (180–190°C) for 60–80 seconds, then carefully remove the tape and paper while wearing heat-resistant gloves. Ideal for protecting surfaces from hot or cold drinks, these coasters are suitable for use with mugs, glasses, wine glasses, and coffee cups in kitchens, living rooms, bedrooms, offices, or restaurants. They can also be personalized with photos—such as family, wedding, or graduation images—for decorative display or as thoughtful gifts. Note: The first image is a digital rendering; the coasters ship blank and ready for customization. Color: As shown Material: MDF Size: 10 x 10 cm Package includes: 1 set of sublimation coaster blanks Other items pictured are not included.