Each item may come in multiple sizes

For example:

A top may come in S, M, L, XL etc.

A gonk may come in Standard and Jumbo

A hat may come in Newborn, Toddler, Child, Teen, Adult etc.

All of these are different sizes.

Sizes are not bound to a particular item, and may be reused across items.

This page will list all the sizes in the system.

It will also show which items have a SKU with each size