Clothes shop how to manage different number of products per size ?

[alivok]

I really don't know how to make it work:

I have t-shirts in stock:

20 of size S
40 of size M
25 of size L
10 of size XL

whatever I do the generator makes it like 20 of S, 20 of M and etc.
How can I add different stock per size for each product ?

[rocky]

After you click "Generate" on the product combinations generator, click "Back to product", then click the Edit button in the Actions column next to each combination, then enter the quantity, then click "Modify this attribute combination".