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Fit Finder | Daily Dash 24L | Eleven Theory
Fit Geometry

The panel is 48 cm.
How long is your back?

This is a measuring tool, not a recommendation engine. It compares one product dimension against one body dimension and shows you the difference. Every number below is either a spec, your input, or a subtraction of the two. Where a value is estimated from published data, it is labelled and given with its error range.

Panel 48 cm Width 32 cm Depth 20 cm Volume 24 L Laptop up to 16"

Reference population

Region

Sex at birth

Trunk proportion differs enough between the two reference distributions that a single curve would be wrong for both.

Your measurements

Height165 cm
140 cm210 cm
Torso length41.6 cm
32 cm60 cm

Shoulder width40.0 cm
28 cm56 cm

Bone tip to bone tip across the top of the shoulders. Not the outside of the arms.

BuildAverage

The load

Depth in use16.0 cm
40% of 20 cm100%

You are setting this, not us. Depth shown is 20 cm multiplied by your percentage. We have no measured relationship between contents and depth, so the presets are only slider shortcuts.

Sternum strapMid
LowHigh

Display

The figure is a proportion model drawn from the same regression set. It is scaled 1:1 against the pack, but it is not a body scan and it is not you.

Drag to orbit / scroll to zoom 1:1 scale
Torso Shoulders Panel 48 cm Sternum

Building the model

Panel against torso

6.4 cm longer

The subtractions

Measured dataYour inputAssumption

Where you sit

32 cm56 cm

Ask about your fit

Fixed facts

    Pre-order the Daily Dash

    About the answers

    The answer panel reasons over your numbers and the product spec. Where it states a dimension, that dimension is computed. Where it makes a judgement about comfort, it says so, because comfort depends on load placement, strap tension, shoulder slope and carry duration, and none of that is in the data.

    There is still no proprietary fit score, because we have not run a wear trial large enough to justify one. When we have, the numbers will come from that trial and we will say so.

    How to measure your torso

    Tilt your head forward. The bone that pushes out hardest at the base of your neck is the C7 vertebra. That is the top.

    Put your hands on your hips with thumbs back and find the shelf of bone at the top of your pelvis. Draw a level line across your spine at that height. That is the bottom.

    Measure the spine between them, tape flat. That is the same landmark pair used in the dataset behind this page, so your number is directly comparable.

    Where the numbers come from

    • Torso and shoulder estimates: regressions computed from ANSUR II (Gordon et al., 2012), 4,082 men and 1,986 women, 93 measured dimensions. Torso is cervicale height minus iliocristale height.
    • Trunk proportion by region: sitting height to stature ratio, from published values for South Asian, East Asian and European populations, applied through a transfer function fitted inside ANSUR II.
    • Regional stature means: NFHS for India, National Health and Nutrition Survey for Japan, NCD-RisC for Europe and North America.
    • Known limits: ANSUR II is a serving military sample, so it is fitter and narrower in age than the general public. Regional adjustment is proportional, not a separate national survey. Treat estimates as a starting point and measure yourself if the margin is close.