U.S. Polo Assn.Men's Classic Polo Shirt, Two-Button Closure Pique Polo Shirt, Summer Fashion Golf Shirt

Does the shirt has one or two men on the horse?

I would like to know the medium size in polo shirts chest size in medium ?

Why can't exchange this shirt for a 1X as this is way too big for my husband?

I'm 5'6-5'7, 155 lbs, and have a slim body type. when it comes to polo shirts, i don't like anything loose. should i go for small or medium?