Shows only product Attributes combination, how?

Hi i building my first shop in Woocommerce. In my store i have screws in namy variations - sizes. So i create Product attributes "sizes" the price  depend on it. For example i have screw "A" and screw  "B" . "A" has size 3'', 4''  and    " B" has size  1'', 2'' . So i added Attribute Combination. But in front and In both screw users sees all sizez for both screews. So they can select not existing size for screw.

Nop 3.8
I have selected Allow only existing attribute combinations, Track inventory by product attributes
I could find solution at forum


Thanks

wad wrote:

PS, I have made mistake before and i wrote woocommerce i mean nopcommerce

Still this option isn't the best. If you choose screw A you still can see all sizes and only in case of trying to add size 1 or 2 to the cart you get an error "Out of stock". But I'd say in case attribute combination (e.g. "A" and "1") doesn't exist at all it would be better not to show it at all.
Is there any way for that?

Agreed.

Any input on this Andrei?

Hi, anyone knows how to overcome this problem? Thank you.