Member’s Mark Red Checked Basket Liner Sheets are essential for serving food, hot or cold. Place a liner in each basket, and it will be ready to go for sandwiches, hot dogs, burritos, snacks and more. The sheets are dry-waxed, so they will help keep things tidy when you’re serving food. Plus, they won’t fall apart when they come into contact with moisture. How big are these basket liners? Each sheet is 12" x 12" Is it OK to put these sheets in the microwave? Yes, these basket liners are microwave-safe.