USMC Private First Class Rank Green on Red is the official embroidered patch for Private First Class. A private first class is the second rank in the United States Marine Corps and is to set an example for newly enlisted Marines. They are also responsible for carrying out duties of those ranked ahead of them. This green on red embroidered patch is an official issue of the United States Marine Corps and is ready for uniform. Measures at 3 ¾ by 3 inches is regulation size, sold in pairs and is made in the USA.