Aida, they're a completely different kind of fabric and cut (or Kut! - ha!) than the white ones. They're the Mias.
Unlike the Diana, they're an ultra skinny. So they are more sleek and calf sucking. But in this case it really works because the fabric is different from regular denim, much more stretchy, yet also substantial -- and pretty special. It's a bit like those pants that Angie showed in the blog, today, actually -- sort of satiny in feel. But somehow not flimsy; it's got structure. The pair that I currently own (and am keeping) are size 0. This year they are admittedly quite snug on me because I'm up a few pounds. But they stretch to accommodate and I tend to wear them with a long sweater anyway. Last year they were fitted but not quite as snug.
But here's the thing. I tried the 4s on, and they're not a whole lot different! Yeah, they are looser, but if I didn't have the 0s already, I'd probably keep them and like them. Yet I also think they would stretch to fit somebody larger than me very easily -- simply because the 0s are accommodating me, even with my added weight.
Not sure if that is helpful at all, but I'm betting they'd work for quite a range, honestly.
So, Lisa, you want to try first? I can send them if you like!
And then Aida and Una can decide if they do not work for you?