Hand crocheted mug cozies add some personality to your cup, protect your hands, and add a layer of insulation to keep your beverage warm. Plus, they give you a chance to show off your fancy crochet skills at the office, school, or wherever you drink your coffee! They even cover the bottom of the cup, so they act as a coaster, too! Each cozy fastens through the handle of your mug with a button of your choice. This cozy will fit common-sized coffee cups with straight sides - the mug shown in the photo is about 3.5 inches tall with a 3 inch diameter (9 cm tall/ 8 cm diameter).