First of all, the decorative nature is the most important, so you can't carry too many items. Conciseness and skilled are the characteristics of men.
Secondly, the length of the belt
should not be ignored. After the belt is fastened, the tail end should be between the first and second crotch.
Thirdly, the width of the belt should be kept at three centimeters. If it's too narrow, it lessen male masculinity. If it's too wide, it is only suitable for casual or denim-style clothing.