Multiple Products & Customization

Hello,

I am looking for some help here bc I can’t find it anywhere.

What I want to do is to have a customer go into the page, be able to customize the order and select the different sizes of apparel they want.

This is my current custom product page for one of the items: https://www.toplevelshirts.com/product/teeshirts/ and keep in mind that we want to do this for all the custom items.

REQUEST 1
As you can see in the link now, there is only the option to select 1 size. I would like to implement something where the customer can select multiple sizes for the order, and of course, transfer this to the checkout. Something like Order Multiple tab on this page: https://shop.craftsports.us/active-extreme-2-0-cn-ss-m.html

I would like to make this an option for specific products and/or categories.

Any ideas or plug ins that can get this done? Thank you!!