Standard Size 4" - Coasters are standard size and fit into most glasses such as cups and Mugs, bourbon, highball, lowball, glasses, coffee mugs, tumblers, flasks, Mason jars, and large fountain drinks. Anti-Slip Backing Cork - These coasters have a non-slip backing and can also be used as a table protector. With these coasters on their side, they'll protect your surface from your spilled drink and protect their beautiful design against wear and tear. A Premium Unique Gift - Do you want your gift to be different and luxury from others? Then these Personalized Marble Coasters are a perfect addition to a gift given as a housewarming gift, holiday gift exchange, or a birthday present for men and women. Enjoy These Coasters - while having your drink, Perfect for Wedding Gift, Bride and Groom housewarming gift, Christmas Holiday Gift, Black Friday or Cyber Monday Gift, Valentines Day Gift, Mothers or Fathers Day Gift, Birthday Housewarming or Anniversary gift idea for him or her and many more. These Marble Coasters are perfect for placing beneath teacups, wine glasses, tumblers and mugs will adorn your home/office dining table or central table. When you're entertaining guests in your living room or dining room or out on the patio, you want your décor to impress, then this will be the best attraction for everyone. ; Natural Stones Details and Names: White Marble: Thasos 4”X4” Greek Marble ( From Greece) Field Tile. Tumbled Grey Marble: Italian Carrara 4”X4” Marble( From Italy) Field Tile. Tumbled Tan: Ivory/Beige 4”X4” Turkish Travertine ( From Turkey) Field Tile. Tumbled