What is the term for a belt made out of the same material as the outfit it accompanies?

The term "self-belt" refers to a belt that is created from the same fabric or material as the garment it is designed to complement. This type of belt is often used to accentuate the waistline and maintain a cohesive look between the belt and the outfit. Self-belts are popular in dresses and ensembles where a unified appearance is desired, providing elegance and a tailored finish.

In contrast, while terms like "fashion belt" or "matching belt" could imply coordination with the outfit, they do not specifically denote that the belt is made from the same material. An "accessory belt" is a more general term that may refer to any belt used as an accessory but does not emphasize the matching fabric aspect. Thus, "self-belt" precisely captures the concept of a belt that blends seamlessly with the outfit's material.