I am importing my products with a CSV from my supplier. Some products have multiple sizes, so I might have an item that comes in 3 sizes so its on the differnt lines in the csv. The product number is different, the description is the same, but the size is different.

I am importing the items , with the size in the attribute no issue. But I want to display them in my store as one item, with size options. At the moment Im getting the same item listed 3 times, but in the different sizes.

Can anyone help my try to work this, im pullling my hair out !!!

By the way I need to import my stock a couply of times a day and I have over 4000 products so manually doing it isnt an option.