Welcome, Heather!
Yeah, I can see that the measurements would be somewhat more complicated. But I don’t see how the current sizing system (“Size 12” or whatever) makes it any simpler. At a minimum, a specific size should mean specific measurements. A buyer should know that, within limits, if a size XXX at one store fits, that same size at another store will fit as well. That isn’t the case now, from what I’ve read at least.
In fact, the differences in the meaning of a size seem huge. As I said in my original post, a size 4 in one store is a size 00 in another store- that’s a tremendous difference, and very confusing.
On the plus side, I have an excuse for not buying my wife clothes as a gift 🙂