The best diameter size for felt coasters: 10 cm. Each 10-piece coaster is equipped with a stackable bracket. Keep them organized and get ready for happy hour! [Multifunctional]-The coaster is durable and has a neutral color, suitable for all furniture and tables, and suitable for every season and facility. Felt coasters are suitable for most glasses, mugs, mugs, beer bottles, oil bottles, vases, flower pots, coffee cups, tea cups, teapots, tea candles, tea light stands, etc. Very suitable for hot and cold beverages, such as coffee, beer, milk, cocktails, juices, [Easy to wash]-The round felt coaster and are made of very high-quality felt. If the stain can be washed, the coaster can be simply wiped off with a sponge and cloth, press out a little water with kitchen paper, and let it air dry. [Protect your table]-The round felt coaster is well-made, and even small of water can be sucked out without giving up anything. Drink coasters can protect sensitive high-gloss lacquer tabletops from scratches, and cups containing hot objects such as coffee or tea. [Exquisite gift]-The classic design looks great, and it is the perfect gift idea for birthdays, weddings, and Christmas. They are very stable due to the materials used. Every product is carefully manufactured size:10x10cm Material:Felt colour:Dark gray Package Contents: 10 x coasters 1 x Storage sleeve Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.