Order multiple items using one product

Lets say for example I have a tan shirt for sale and they want to order the tan shirt in a small so they click in that information now they want to still order a LARGE but there is not a way to . 

Do you know how others are achieving this ?

Thanks 

 You may add a product option in your Product to have an extra option for tshirt size.

Guide:https://www.jotform.com/help/264-Create-Sub-Products-Based-on-a-Product-Option

Example Screenshot:

Sample Form:https://form.jotform.com/92398699566988

Please give it a try and let us know if this fits your requirements.

I found a good example after posting this and tried to take it down .

thank you !