Non-slip tea coasters, natural stone coasters, black Size: Approximately 10cm square Thickness: Approximately 4-5mm Weight: Approximately 103-176g (per piece) *The thickness varies for all 4 pieces. Heat-resistant, insulating, quick-drying There are scratches unique to natural stone and stains on the back, but we hope those who don't mind will use them. They are stylish not only as coasters for glasses and teacups, but also as mats for ornaments! ⭐︎We also have other items for sale, so please take a look if you'd like. #Gon'sWarehouse