Ugly Christmas sweaters are a popular holiday fashion trend, and there are many places to buy them online or in stores. Many department stores, specialty clothing shops, and online retailers offer a wide selection of ugly Christmas sweaters in various designs, styles, and sizes. You can also find unique and one-of-a-kind ugly Christmas sweaters on Etsy or other online marketplaces. Additionally, some thrift stores or vintage shops may have vintage or secondhand ugly Christmas sweaters for sale.