I'm referring to Inventory. That's what I thought you were talking about.

You can have 20 templates per product. I use them for listings, as I don't have variations. I don't know how many products you can have - I'm up to 18, as several categories need more than one. Depending on how far ahead I am.

As I will be doing my semiannual stock up in a month, I expect I will soon find out what limits there are.