Boot cut

Bell-bottoms (or flares) are a style of trousers that become wider from the knees downward, forming a bell-like shape of the trouser leg.

In the early 19th century, when a standardized uniform did not yet exist in the U.S. Navy, some sailors adopted a style of wide trousers ending in bell-shaped cuffs. In 1813, one of the first recorded descriptions of sailors' uniforms, written by Commodore Stephen Decatur, noted that the men on the frigates United States and Macedonia were wearing "glazed canvas hats with stiff brims, decked with streamers of ribbon, blue jackets buttoned loosely over waistcoats, and blue trousers with bell bottoms."

The British Royal Navy had often been a leader in nautical fashion, but bell-bottoms did not become part of the standard uniform until the mid-19th century. These "bell-bottoms" were often just very wide-legged trousers, rather than shaped trousers that flared below the knee. They continued in use as a distinctive feature of the RN rating's "square rig" uniform until replaced by more conventionally flared trousers in 1977.

Although the trousers of the present-day uniform of the United States Navy are still referred to as "bell-bottomed", they simply have large straight legs. The wearer's thigh fills the upper trouser leg, making the bottom of the pants leg appear flared. This style has been popular for many years, perhaps originally because the trouser leg can be rolled up easily, allowing the wearer to work in bare feet, but there is no reliable documentation that confirms a specific timeline or reason for the popularity of bell-bottomed trousers in naval apparel.

In the 1960s, bell-bottoms became fashionable for both men and women in Europe and North America. Often made of denim, they flared out from the bottom of the calf, and had slightly curved hems and a circumference of 18 inches (46 cm) at the bottom of each leg opening. They were usually worn with Cuban-heeled shoes, clogs, or Chelsea boots. Toni Basil, who was a go-go dancer when the 1964 concert film the T.A.M.I. Show was released, appeared in the film wearing bell-bottoms with a baby doll blouse.

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Wikipedia