How to make different links for trade offers?

Question

1C-Bitrix

Hello!
How to make different links for trade offers?
for example site.ru/catalog/product/alias?sku=123
This is necessary so that when you go to the page, the desired size is automatically selected in the drop-down list.

Answer 1

By default, they are already different)
Set in the settings of the IB of trade offers

Answer 2

The example above is correct. The SKU infoblock also has character codes, and through a similar construction, you can achieve the desired Url look