17cm x 17cm 17.5cm x 17.5cm Please allow for some margin of error. Double gauze, 3 layers and 4 layers. The galaxy pattern has no edge stitching, and the opening is hand-sewn. Double gauze becomes even softer with each wash, and has a touch you'll want to keep touching. Handmade by an amateur. I would like to sell it to those who understand.