Drink coasters with a retro library checkout due date card add a vintage feel to your desk or drink. Set of 2 square coasters with rounded corners measure approx. 3.5" x 3.5" and are made from premium laminated hardboard. Featuring a high quality durable easy to clean coating. 1/8" thick makes our coasters lightweight yet sturdy and unbendable. Drink coasters are ideal for house warming gifts, parties, offices, home decor, and more! They are a great way to protect surfaces and add a unique touch to any space. Coasters are handmade using my custom full color graphics. I use a high quality heat transfer printing process for a vibrant, permanent, long lasting image that will not fade, peel or rub off.