Various polo tees in various sizes, from $10-25.
From top left to bottom:
J Crew, Sz L (Yellow), $10
Brooks Bros. Golden Fleece Performance Tee, Red, Sz. L, $25
Polo Golf, Sz. L, Pink w/Diamond pattern, $15
Pringle of Scotland golf polo tee, Sz L, $15
J Crew, Sz XL (Striped), $10 each