Plastic Transparent Cups: Upper Caliber: about 3.2”, Bottom Diameter: 2.6”, Height: 3.7”,With decent size, easy to hold and use. Resin, epoxy can be wiped out easily with alcohol and a paper towel. Stackable, save space, great for storage. Easy to Use, Clean, Store.Made of premium plastic, thick and sturdy, not easy to break, durable & reusable.