Tall & Long-Torso Backpacks: Complete Guide

A torso length is generally considered long once it passes about 19.5 to 20 inches, measured from the C7 vertebra at the base of the neck to the iliac crest at hip level. Most backpack size charts label this range "Large," though the exact cutoff shifts by half an inch or more between brands.

Measuring torso length takes two people and a flexible tape measure:

Tilt your head forward to find the C7 vertebra, the bony bump at the base of the neck where the shoulders meet.

Place your hands on your hip bones with thumbs pointing back to locate the iliac crest, the top ridge of the pelvis.

Have a helper run the tape measure along the curve of your spine from C7 down to the imaginary line connecting the two iliac crest points.

Record the number to the nearest half inch, since most size charts and adjustable harnesses are graded in half-inch increments.

Height and torso length correlate loosely but not directly. A 6-foot-2 hiker can carry a 19-inch torso, while a 5-foot-9 hiker with proportionally longer legs and a shorter torso can also measure 19 inches, or the reverse. Leg length makes up the difference, so a tall hiker should still measure rather than assume a Large or Extra-Large size fits.

Packs built for the longest torsos come from brands offering an Extra-Large or extended-Large size, or from cottage manufacturers that cut a frame to an exact measurement instead of a size band. Mainstream Large sizes commonly reach into the low-20-inch range, while custom-built frames extend further.

Large-size hiking backpacks come from a mix of major and cottage manufacturers, each taking a different approach:

• Osprey offers a Large torso option on multi-day packs such as the Aether Plus, Ariel Plus, and Atmos AG lines, sized to fit the upper end of the standard torso range.
• Gregory builds a Large size into the Baltoro and Deva backpacking series, aimed at the same long-torso band.
• Deuter extends several Aircontact models into a Large fit for taller frames.
• ULA Equipment, a cottage maker, builds frames to a hiker's exact measured torso length rather than a fixed size band, which suits hikers whose torso falls outside standard Large sizing.
• Mystery Ranch offers frame size options across several models, with some built on the brand's adjustable harness platform.

Hikers whose torso measures beyond what a Large size covers, or who fall between a Large and an unavailable Extra-Large, are the group most likely to benefit from a made-to-measurement cottage pack rather than a stock size.

Adjustable suspension uses a hook-and-loop or ladder-lock harness that slides several inches to fine-tune fit within one size, while a fixed frame is cut and sewn to a specific torso length with no in-pack adjustment. Adjustable frames suit hikers near a size boundary; fixed frames, common on ultralight packs, fit best once torso length is already known precisely.

The two approaches trade off differently for a tall hiker:

• Adjustable harnesses add a small amount of weight from the sliding hardware but let one pack fit a torso length that shifts slightly, or let two people in the same household share a pack.
• Fixed frames, common on ultralight and cottage packs, remove that hardware weight but require ordering the exact size or custom length up front, with no room to correct a measurement error after purchase.
• An adjustable harness typically covers roughly a 3-inch range within its stated size band, not the full jump from a Medium to a Large, so it corrects small measurement uncertainty rather than replacing correct sizing.

Tall hikers who know their torso measurement with confidence, and whose measurement stays consistent year to year, often do better on a lighter fixed-length frame. Hikers who are unsure of their exact number, or who are still narrowing down a size, benefit more from the margin an adjustable harness provides.

A correctly fit long-torso pack keeps the hip belt centered on the iliac crest, the shoulder straps meeting the top of the shoulder without a gap, and the load-lifter straps running at roughly a 45-degree angle from shoulder to pack. Any deviation from these checkpoints signals the wrong torso length rather than a flawed pack.

These checks only tell the full story once the pack carries a real load. Load the pack to roughly 20% of bodyweight, the guideline most hikers use for a comfortable multi-day carry, before judging fit, since an empty pack can look correctly adjusted while collapsing out of alignment once weighted. Walk for several minutes, then recheck the hip belt position and load-lifter angle, since straps that felt right when standing still sometimes shift once the frame settles under load. A hip belt that migrates upward off the iliac crest after walking usually means the torso length is still too short even if it looked correct at first.