How A Baseball Cap Is Constructed
Crown
The top portion of the cap. The crown is made of 5-6 panels.
Profile
The height of the Crown. A cap comes in one of three profiles: High (Snapback), Mid (Classic Baseball) and Low (Dad Hat)
Buckram
Stiff woven fabric for structure in the front two panels of the Crown.


Visor
Fabric covered plastic attached to the front of the crown

NBI Metal Crown
The standard for hat quality, excellence and integrity.
Closure
The cap back, which determines the fit size and style such as stretch fit, adjustable and fitted closures.
Stretch Fit: A closed back featuring special fabric which stretch to fit a range of sizes. Typically sizes include S/M and L/X.
Adjustable: A closure which can be adjusted to fit a larger range of sizes. Most often you will Snapback, Velcro or a fabric pull through buckle.
Fitted: A Closed back which provides a fit specific to the size of your head. Often times measured in inches; 7 1/4", 7 5/8", etc.