Brewing basket measures 4 x 4 x 3.375-inches. Fits 2.25-inch diameter openings or larger. Brewing basket measures 4 x 4 x 4-inches. Fits 2.25-inch diameter openings or larger. Use the arms to rest the basket on the rim of a cup. Heat-retaining lid keeps tea warm until desired strength is reached. This permanent tea filter is perfect for brewing your favorite drink. Ideal for tea, herbal tea, fruit infusions, or even coffee. Plastic frame and lid. Stainless steel mesh for easy cleaning and long-lasting use.