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For the large size
Torso size: 20+ inches
Waist/Hips: 33+ inches

Here's how you measure for torso length.

Thats too bad. The Exos is an excellent pack. I own a 46 small myself. Best of luck to you!

Since you didn't use it and still have the tags, wouldn't the store let you return it or exchange it? Just saying... It's worth a try.