Blank Coasters - 150-Pack Square Cardboard Paper Coasters, 4 x 4 inch Absorbent Plain Off White Pulp Board DIY Coasters for Drinks, Arts and Crafts Projects, Printing, Letterpress, Mini Art Zen Boards - Walmart.com
Coaster Blank, Round Compatible with Infusible Ink system | Cricut.com
Blank Coasters | Etsy
Square Plain Off White Coasters 4 Inches (50): Coasters - Amazon.com