Ceramic Mortar & Pestle Great For Grinding & Mixing Substances. This is a new ceramic mortar and pestle. Great for grinding and mixing substances. Approximate measurements: Inside top diameter: 3 1/2" (89 mm). Inside depth: 1 3/4" (44 mm). Overall size: 4" x 2 1/8" (101.5 x 53 mm). Pestle: 3 3/8" (85.5 mm) long. We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.