I'm not one for loud holiday sweaters. But I'm all for festive accessories though. Take for example, these Anonymous Ism Fair Isle patterned socks. They come in a bunch of colors, and are made from a comfortable cotton/acrylic blend that isn't too thick or thin and have a nice stretch. They're also really comfortable in sneakers or dressier shoes. And unlike most sought-after things made in Japan, they're actually pretty affordable at $25 each. They're perfect for wearing to the company Christmas party, or anywhere else, really. Just be sure to keep the rest of your kit relatively solid. After all, you don't want to look like you had a little too much eggnog before you got dressed.
Anonymous Ism, $25