Most shirt collar layouts are made with what is referred to as a Collar Stand. A Collar Stand can be a body that makes the collar get up which is why most shirt collars feel thicker than the rest of the shirt. Also referred to as a “Mandarin collar,” this https://types-of-collars-shirt41525.imblogs.net/77075136/helping-the-others-realize-the-advantages-of-types-of-collars-shirt