WHAT ARE HATS?
A hat is an item of clothing which is worn on the head– a kind of headgear. Hats are differentiated from caps by being more elaborate; hats have a high crown, a brim, or both and are larger than caps. A hat may be either placed on the head or, in the case of some women's hats, secured with hat-pins (which are pushed through the hat and the hair). Many hats are intended only for men or for women, while other hats are fashionable for both sexes. Purveyors of men's hats are called hatters and purveyors of ladies' hats are called milliners.
HAT SIZES
When a hat is made, it is also blocked to a certain hat size. Generally, less expensive hats will be a named size such as small, medium, large, and extra large. Finer hats are more strictly fitted to a person's head and have a numerical size.
Metric hat sizes are simply the distance around the persons head measured in centimeters, usually rounded up to the next centimeter if the measurement falls between the centimeter marks.
American hat sizes are similar, but the distance is measured in inches and then divided by pi. i.e. .
Since C = 2πr and since 2r = d
More specifically: the American numerical hat size is merely the average diameter of the head, determined by measuring the circumference of a person's head about 1/2 inch (1.3 cm) above the ears, dividing by pi, and rounding to the nearest centimeter or eighth inch. Also note that in the UK, an equivalent hat size is an eighth inch smaller than in the US. Some hats will stretch a size or two, but this can not be depended on for sizing purposes unless previous experience with the model of hat in question indicates that it will stretch.
Major hat styles
Bowler hat: The bowler hat is a hard felt hat with a rounded crown created for Thomas Coke, 2nd Earl of Leicester, in 1850. In the United States, this hat is also known as a derby hat.
Top hat: A top hat is a kind of tall, flat-crowned, broad-brimmed hat worn by men throughout the 19th and early 20th centuries, now usually worn only with morning dress or evening dress.
Trilby Hat:
Baseball cap: A baseball cap is a type of soft cap with a long, stiffened and curved peak. It is arguably the most popular style of hat in many Western nations. Baseball caps are often associated with gang or 'yob' culture and are popular with many lower socio-demographic groups including chavs and bogans.
Cowboy hat: Though thought of as a consistent style, cowboy hats are simply highly rugged and utilitarian hats. Made of felt or straw, they feature large brims (as wide as four inches or more) to protect against rain and sun and some are even designed to hold water in the crown. Common styles include a safari style brim (with the brim turned down in the front and back) or a brim sharply curved up on either side. The last brim style has the effect of lowering the front of the brim to better protect the wearers eyes from the sun.
Sun hat: Generally made from straw, cloth, or both and featuring an excessively large downturned brim, this style is simply designed to keep the sun off for gardening, yard work, or lounging.
Pointy hat
Homburg (hat)
Fedora (hat)
Slouch hat
Balaclava
Urban wear hat: Hats found in urban or suburban areas are intended to be more fashionable than functional. They have smaller brims of three or fewer inches and are flashy and made to stand out. A typical hat found in the city has an upturned back and downturned front, a wide grosgrain hatband, neatly tied, and an optional feather. The upturned back is an innovation to prevent the collar of the wearer's coat from hitting the hat.
Additionally, if the wearer often uses a rifle, pickaxe, or shovel, the side that the implement is used on can be folded up and pinned or clipped to the crown to avoid knocking one's hat off.