Thank you for viewing! I've made coasters using a natural, Scandinavian-style fabric. This is a set of 3. Each one has a different pattern, making them cute! ^ ^ The outer fabric is a cotton-linen canvas with a firm interfacing. The lining uses cotton fabric with flecks (cotton particles), so you may see small black dots (cotton particles). Recommended for those who like a natural look. The lining is 100% cotton. Size: Approximately 10cm in diameter *I work carefully, but these are handmade items by an amateur, so there may be some imperfections like slight distortions or misalignments. Thank you for your understanding before purchasing.