I think this shirt would fit a medium category best with the shorter arm measurements. Notice both items have been sharply pressed.
The pants waist measure 34" with a 31" inseam, have a blue & yellow stripe on each leg and the color is not a perfect match to shirt. See last photos of faint smudges near each cuff hems. There is no material tag on pants, so I have to guess that they are synthetic. Lower 48 is 12.99. The item "Vintage CHP California Hwy Patrol Uniform Shirt & Pants See Measurements" is in sale since Wednesday, August 25, 2021. This item is in the category "Clothing, Shoes & Accessories\Specialty\Vintage\Men's Vintage Clothing\Other Men's Vintage Clothing". The seller is "goodfiger2" and is located in Dubuque, Iowa. This item can be shipped to United States.