Made in Canada by BOMA Set of 4 coasters These have been stored at home for many years. I believe they were a gift, but I'm not sure when they were given to me. The coasters are about 8.5cm in diameter. The surface is resin? plastic? type material with a glossy finish. The back is cork. They have been opened, but are probably unused and have aged, so please understand this. Due to shipping costs, I plan to remove them from the case for packaging. They will be shipped via post (letterbox delivery).