nathan-size-chart

Guide only. Tap cm or in to switch units.

Vests - unisex / men

One sizeSternum 56 – 114 cmSternum 22 – 45 in

Vests - women

SizeSternumBust
XXS – M66 – 84 cm26 – 33 in76 – 91 cm30 – 36 in
L – XXL84 – 104 cm33 – 41 in94 – 112 cm37 – 44 in
1X – 3X104 – 127 cm41 – 50 in114 – 130 cm45 – 51 in

Most Nathan vests are one size and adjust with the straps. Hydration belts too.

Reflective vests

SizeSternum
S / M61 – 102 cm24 – 40 in
L / XL96.5 – 114 cm38 – 45 in

Worn over your layers. Between two sizes, take the larger one.

Tops - men

SizeChest
XS86 – 91 cm34 – 36 in
S94 – 99 cm37 – 39 in
M102 – 107 cm40 – 42 in
L109 – 114 cm43 – 45 in
XL117 – 122 cm46 – 48 in
2XL124 – 130 cm49 – 51 in

Nathan publishes chest measurements only.

How to measure

Sternum: arms relaxed, measure just below the chest bone, tape parallel to the floor.

Chest / bust: measure the fullest part, tape parallel to the floor.