Come to think of it, I currently do not have a single pack that I purchased from a store. I tried on a ULA Circuit in a store (only one I know of with the ULA line on display - Down Works in Santa Cruz, CA) but ordered it from the company. The rest were ordered based on my accurate measurements, which I figured out for myself after being measured incorrectly in stores for two-three years.

I did not need 50 - 70 liter packs, which is generally all stores carry. I ordered a Jade 40 (Gregory) online at a very good discount. Also a Granite Gear pack, same thing, great discount.

If you have accurate sizing you can order a pack online and be successful - if the pack will work for you. I have had far more luck with this than I have with box store purchases, which were all sold on ebay.