What a cute and whimsical coffee mug. It is made by Hartstone Pottery in Zanesville, Ohio. Hartstone Pottery started in Chatham, New Jersey by Pat and Sharon Hart. In 1983 they moved to Zanesville, Ohio. It was sold in the 1990's and then the current owner renamed it Ohio Stoneware when the acquired it in 2018. This mug comes from the second owners of Hartstone Pottery. This super cute mug has 3 adorable piggy on it all hand painted. The pig are white and black, brown and white, and mustard and black in color. They have such cute facial expressions. It is in excellent condition with no chips or cracks. There is no staining on the inside as it looks like it was never used. In between the handle and the mug are the initials PC hand written. On the bottom it says HARTSTONE USA 8-24-01 with the initials B.B.There is also a Copyright ©️ symbol. It stands 3.5 inches tall and is 4 inches wide at top. It is a good sized mug.