Four 4" x 4" Square Slate Coasters. Made of actual stone with chipped edges. Sizes may vary. There are 4 foam dots on the bottom. All Slate items are coated with a scratch resistant, Food Safe Coating. This item is print-on-demand. Please allow for an additional 2-3 days for your order to ship. Print-on-demand items are non-returnable except in the case of an item defect.