Sweetwater Decor 17oz Fine Bone China. 4 x 3.5" (5.5" w/handle) White “Homebody” Mug Honeycomb Design w/ real Gold Handle & Details Hand wash only Use Caution When Removing from Microwave Cited from Sweetwaterdecor.com CARE: Hand Washing Recommended to Preserve Microwave Safe Gold Finish Wash Before Use and Avoid Abrasive Cloths When Cleaning Use Caution When Removing from Microwave If Sparks Occur or Handle Becomes Too Hot, Discontinue Use in Microwave Warning: Gold Handle May Get Hot In Microwave-Microwave At Own Risk.