Since this seems to be a new production item, I'm going to share a few pics to give a visual on how it fits. It seems perfect for me. In just a shirt, I still have 3-4" I could take up if needed, yet plenty of belt to get around my hip bones, and fit with heavier clothing as well. I tried it on with an insulated parka, and it was fine.
Anyways, here are a few pics. If it looks like I'm leaning forward a bit, it's because there are 90 lbs of weight plates in the pack.
Shane