I assume it involves creating custom code to make it work? I had done that, but it’s a pain to add the variants, would love to have a decent UI to do it. Even if I need to download an app, but can’t justify paying an extreme amount each month 

I have a woodworking website that is selling wood for people to make pens, cutting boards, bowls, etc. In my products I have the different species of wood. For example, Walnut. I have each size listed as an individual variant, 3/4” x 3/4” x 6”, 1.5” ...