Our new Signature Series Square Absorbent Stone Coasters offer a fresh new option for the coaster category, These collectible coasters measure 4"" x 4"" and have a porous surface which allows the coaster to absorb condensation off of a drinking glass, Each coaster measures 4"" x 4"" Four coasters per set Cork backing to protect tabletop surfaces Abosrbent coaster surface Made in USA SKU: IDMN578