Slate and Solid Wood Coasters Wooden coasters are made from natural, sustainable red oak. Thickness may differ by design.Mug/glass size coasters are approximately 4-3/4″ while the coffee pot/ Margarita pitcher coasters are approximately 7-1/4″ in diameter. Beach Themes When You Wish Upon A Star Beautifully carved into .25″ red oak, these 4.75″ diameter coasters will add a touch of the sea wherever you use them. Perfect for all sizes of coffee mugs or glasses. Great for Margarita glasses too!Backed with cork to prevent sliding and marring surfaces. Raised Starfish This unique design features a detailed starfish which is raised above the base for a distinct style. Slate Coasters Black slate coasters are made from naturally absorbent slate. Thickness may differ slightly from coaster to coaster. Each comes with 4 rubber pads to prevent scratching. That's What I Do... These Game of Thrones inspired coasters display your beverage of choice, adult or otherwise.Available in sets of 4 matching or 4 mix and match. Sports Family This unique design features a detailed starfish which is raised above the base for a distinct style.