A polo shirt is a form of shirt with a collar, a placket neckline with two or three buttons, and an optional pocket. Polo shirts are usually short sleeved; they were used by polo players originally in India in 1859 and in Great Britain during the 1920s.
The easiest way to differentiate between dress shirt styles is by looking at and understanding dress shirt collar types. The shirt collar will indicate how formal a dress shirt is – note how casual shirts don’t have collars. It will also dictate whether it can be worn with jackets or ties.
A mandarin collar, standing collar, band collar or choker collar is a short unfolded stand-up collar style on a shirt or jacket. The style derives its Western name from the mandarin bureaucrats in Qing-era China that employed it as part of their uniform.