I received this in khaki in a medium/large. I always wear a 7 3/8 hat. That size is a the high end of M/L and the low end of L/XL. It fits snug but not uncomfortably so. I'm docking 1 star for the color. Khaki is a varing color but this definitely tan with no slight tinges of green, at least as I perceived it to be. It is overall a very well designed and accomplished piece of headgear.