Knit your own Polo Dickey using these clearly-written instructions by knitwear designer Jackie E-S of HeartStrings FiberArts.

Polo Dickey is a versatile sweaterette suitable for wearing under V-neck sweaters, open-necked shirts, etc. A dickey is just right for occasions when an entire shirt under a sweater would be too much. Yet you need a little bit of extra warmth, or you want the look of layered fashion without the extra layers. Directions are included for both men's and women's styles of button plackets.