Description: The wood base of the glass coffee filter holder is 4.25 inches, which fits most cups, mugs and glass bottles. The reusable dripper can be perfectly mounted on 10-36 ounce cups. The size of the glass filter is 4.5x4.5x3.4 inches Simple to Use:Simply heat the pour over coffee filter with hot water and rinse out, add coffee grounds, slowly pour in the hot water, let the coffee maker drip out the water through the fine pour over filter, and remove the coffee dripper when done, ready to enjoy your drink. Compact and lightweight, the coffee dripper works great at home or work or while traveling or camping. This pour over coffee dripper is made with a durable, thick glass construction that you can feel - not flimsy plastic or weakly welded steel mesh. And unlike mesh filters, no special brush is needed to keep it clean. Best of all, it is dishwasher safe. Great Design:Inner swirl design of the glass pour over coffee filter guides water evenly to maintain a proper flow rate that guarantee the water fully penetrates through the ground coffee for ideal extraction of flavor. Specification: Wood base : Inner diameter 3.46 inch , Outer diameter 4.25 inches Package Includes: 1 set Pour Over Coffee Dripper Note:Customer satisfaction is our primary concern. If the product is somehow cracked or broken during shipping, please feel free to contact us. We will try our best to give you a satisfactory solution.