Dimension: diameter of a coaster 10cm, diameter of the coaster holder 11cm Gross Weight: 420gr, material: bamboo with mosaic - You can place your beer glass, coffee cup, tea cup, cold drink on these coasters. Not only is it beautiful, but it can also insulate and effectively catch condensation from cold drinks, protecting your desktop, countertops, or other surfaces from stains or damage. - These black-colored bamboo coasters are lacquered with mosaic suits for all families, hotels, restaurants, and bars, or give them as a wonderful Mother’s day or holiday gift to a friend of loved one. - Beautiful decorations and presents - set of 6, each coaster diameter: 4". use them for party, new year, birthday gift, christmas gift, halloween gift, surprise for mom, daddy, grandpa, grandma, for lovers, for colleague, valentine’s day gift for girlfriends or boyfriends. It is woven by hand, so the size of single coaster will have a very small difference, this is normal.