Size and Suitability* Outer dia is 4.13", inner dia is 3.74", and thickness is 0.59". Suitable for cups with bottom size of 3.6" and smaller (diameter). Fit with a variety of holder types, including beer mug, coffee mug, wine glasses, water cup… Material, Natural and Absorbent* S1EGAN “Panc" coasters are made with acacia wood. Each piece comes with natural touch, heavy quality, and unique pattern identity. The central area of those “Panc" coasters are made of premium soft wood materials, which allows the coasters to absorb liquids. Keep everything tidy and clean. Protection, for Tables and Cups* With “Panc" coasters, your table will be duly protected from the usual 'rings' and other marks that come up when you place your glasses on the surface. The thick materials also keep the table surface protected from high temperature damage. The strong grip in the central area will hold the cup in place, prevent it from unexpected sliding. Holder-free Concept* Like every other coaster from S1EGAN, Panc is designed holderless so it can be stacked up on one another easily when set aside. Last bit, A Perfect Gift* A delicate and practical gift for housewarming, holidays, parties, and occasions. Acacia wood coasters with cork, six in a box.Outer dia is 4.13", inner dia is 3.74", and thickness is 0.59". Suitable for cups with bottom size of 3.6" and smaller (diameter). Material, Natural and Absorbent* S1EGAN “Pan" coasters are made with acacia wood. Each piece comes with natural touch, heavy quality, and unique pattern identity. The central area of those “Pan" coasters are made of premium soft wood materials, which allows the coasters to absorb liquids. Keep everything tidy and clean.