The North Face

Backpacks
Men's Backpacks
 SML
Torso Length 15 - 18in
(38 - 46cm)
17 - 20in
(43 - 51cm)
19.5 - 22.5in
(49.5 - 57.1cm)
Chest Measurement 36 - 38in
(91 - 97cm)
39 - 41in
(99 - 104cm)
42 - 44in
(107 - 112cm)
Waist Measurement 28 - 31in
(71 - 79cm)
32 - 35in
(81 - 89cm)
36 - 39in
(91 - 99cm)
Women's Backpacks
 SML
Torso Length 15 - 18in
(38 - 46cm)
17 - 20in
(43 - 51cm)
19.5 - 21.5in
(49.5 - 51.6cm)
Waist Measurement 25 - 26.5in
(64 - 67cm)
27.5 - 29in
(70 - 74cm)
30 - 32in
(76 - 81cm)
Chest Measurement 33 - 34.5in
(84 - 88cm)
35.5 - 37in
(90 - 94cm)
38 - 39.5in
(97 - 100cm)
Men's Two-Size Fixed
 S/MM/L
Torso 16 - 19in
(40.6 - 48.25cm)
18 - 21in
(45.7 - 53.3cm)
Waist 26 - 32in
(66.0 - 81.3cm)
32 - 40in
(81.3 - 101.6cm)
Women's Two-Size Fixed
 S/MM/L
Torso 14 - 17in
(35.6 - 43.2cm)
16 - 19in
(40.6 - 48.3cm)
Notes:
Most packs come in different sizes or have suspensions adjustable to your torso length. The most important thing is to match your torso length with the size of the pack.
Torso:
Measure your torso length by bending your head forward so your chin touches your chest. Feel for the most prominent bump at the back of your neck. Now measure from that point down to an imaginary line connecting the tops of your hips around your back. This works best with a partner's help.
Chest:
Measure around your chest/bust, holding the measuring tape under your armpit.
Torso:
Measure around your waist just above your hips.