How to filter products by size in repeater connected to wix store collection

Hi Wixers. I need to filter my dataset by the size of the product with a drop-down menu but I can’t find the way to do it. I try Wix AI but it gives me the wrong code all the time.

So I have a repeater connected to the Wix store/product collection. i connected everything I wanted to it like the picture price description. the only problem I have to set up filtering. this product has size and color options. I have a dropdown menu connected to the dataset but it can’t be connected to the product options field in the dataset. it should be done by Velo but I can’t figure it out how. can please someone help

I’m working in Wix Studio