What is a custom design and semi custom design?

A custom design in fashion is a garment that is one-of-a-kind especially for a particular person. It is usually designed with color, silhouette, size, and fabric chosen specifically for one person.

Semi-custom design in fashion is a garment that may have some elements that make it customized, but not 100%. For example, maybe only one or two elements - color, size, or fabric - are chosen specifically for one person, but the rest of the garment is a basic design that's already been designed for other garments as well.