A belt is a flexible band or strap, typically made of leather or heavy cloth, and worn around the waste.
A belt support trousers or other articles of clothing.
Before the 1920s, belts served mostly a decorative purpose, and were associated with the military.
Men started belts in the 1920s as trouser waists fell to a lower line.
The first recorded use of belt loops on trousers is 1922, when a jean company added them.
A belt consists of:
The buckle should be minimalist, polished, somewhat narrow, and single pronged.
A buckle may be round or flat, small or large, matte or polished.
The more casual the occasion, the less elegant the buckle required.
The buckle may be single pronged or double pronged.
The formal belt should match your shoes in color, contrast, hue, and tone, and ideally leather. Casual belts do not have to perfectly match, but should not be more than a shade different.
The belt should be 1 1/4” - 1 3/8” wide and approximately 1/8” thick.
The belt should be long enough that it goes under the first belt loop after the buckle. The belt should not be so long that is not laying flat against itself. The belt should be no longer than 3 inches beyond that loop.
The belt should lack all excessive styling.
You can find some exceptional casual leather belts from:
Note, many shoemakers make casual leather belts.