According to the tags, it was made by Gelhaar Uniform Company in Kansas City, Missouri and it was issued on May 25, 1959. The shirt has several plastic buttons, (1) American Red Cross First Aid Patch, and (1) period MSHP shoulder patch. The shirt and pants in this set do include size tags, but since they are almost 70 years old they could have shank.
As such, I have not tried to measure these items and suggest that they are best for display and not for wearing. The man who wore this uniform was an approximately 6'2 tall World.War II-veteran from Kansas City Missouri named Harold Spencer King. After he left the military he worked as a police officer for a short time before joining the MSHP. He left the MSHP in the late 1950s to work as a private investigator for a local law firm. The item "OBSOLETE 1950s Missouri State Highway Patrol Uniform Shirt/Pants Gelhaar CC" is in sale since Thursday, August 16, 2018. This item is in the category "Collectibles\Historical Memorabilia\Police\Other Police Collectibles". The seller is "genealogyrs" and is located in Blue Springs, Missouri. This item can be shipped to United States.