You can find a wide variety of ugly Christmas sweaters at many department stores, specialty clothing stores, and online retailers. Department stores often carry a large selection of ugly Christmas sweaters during the holiday season, while specialty clothing stores may have a more limited selection but often offer higher quality and unique designs. Online retailers such as Amazon and eBay also offer a wide range of ugly Christmas sweaters, many of which can be customized with names or phrases. Additionally, many craft fairs and Christmas markets may feature handmade ugly Christmas sweaters for sale.