You can quickly assign sizes (and colors/styles) to an entire category of apparel items at once, instead of setting them one by one.
Menu > Products > Category.
Go to MENU, then select PRODUCTS.

Select CATEGORY, Select any apparel category (e.g., T-Shirts, Hats).

Click the SIZE tab.
Select a size template from the MATRIX dropdown menu.

To create or edit these templates, see: Apparel Sizes KB
The selected template will appear in the preview.
Click SAVE.

RESULT:
When you ring up any item from that category, a window will appear showing the available size options for the customer to choose from.
