john79 - Well. The only problem here is that you are looking for free plugins. I don't know for sure, but it is a pretty safe guess. There's one plugin I want to share here. All you need is this one https://woobewoo.com/plugins/woocommerce-filter/ . Just try the demo and you will be convinced.

karl9 - Yes, I was trying to find a free plugin. But if the one you've shared is good, I will pay for it.