Handmade mats. They are sturdy because they have quilt batting in between. Sizes: Small is about 20cm x 20cm, 4 pieces Large is about 29cm x 23cm. I think there are various ways to use them. The mug is not included. Thank you for your understanding of handmade items. Serving supplies... Placemats Serving supplies... Coasters Material... Cotton Pattern/Design... Check Type... Patchwork Material... Cotton