Crochet: it's not fucking knitting. Don't make us have to use our hook! Back features a ball of yarn and hook. Created in my New Jersey studio from stoneware clay and kiln fired to over 1900 degrees. This mug measures 4 x 4 and holds 16 oz. All glazes are lead free and non toxic. This item may be placed in the dishwasher or microwave- made to be used and enjoyed. Funny gift for someone who enjoys crochet and swearing.