ALPINESTARS PROTECTION

KNEE GUARD

SizeJoint Width
Small 3.27 - 3.54in
(8.3 - 9.0cm)
Medium 3.54 - 3.90in
(9.0 - 9.9cm)
Large 3.90 - 4.37in
(9.9 - 11.1cm)
X-Large 4.37 - 4.90in
(11.1 - 12.4cm)

BODY ARMOUR

SizeEuroUSChestWaistHeight
X-Small 46 36 35.0 - 36.6in
(89 - 93cm)
28.7 - 30.3in
(73 - 77cm)
5'7" - 5'9"
Small 48 38 37.4 - 39.0in
(95 - 99cm)
31.1 - 32.7in
(79 - 83cm)
5'9" - 5'10"
Medium 50 40 39.8 - 41.3in
(101 - 105cm)
33.5 - 35.0in
(85 - 89cm)
5'10" - 5'11"
Large 52-54 42-44 42.1 - 43.7in
(107 - 111cm)
35.8 - 37.4in
(91 - 95cm)
5'11" - 6'
X-Large 56-58 46-48 44.5 - 46.1in
(113 - 117cm)
38.2 - 39.8in
(97 - 101cm)
6' - 6'1"
2X-Large 60 50 46.9 - 48.4in
(119 - 123cm)
40.6 - 42.1in
(103 - 107cm)
6'1" - 6'3"
3X-Large     49.2 - 50.8in
(125 - 129cm)
42.9 - 44.5in
(109 - 113cm)
6'3" - 6'4"
4X-Large     51.6 - 53.1in
(131 - 135cm)
45.3 - 46.9in
(115 - 119cm)
6'4" - 6'5"

BIONIC NECK SUPPORT

US SizeChestChest ThicknessBNS Size
 42 32.3 - 33.9in
(82 - 86cm) 
 Slim  X-Small
 Normal  X-Small
 Barrel  Small
 44  33.9 - 35.4in
(86 - 90cm)
 Slim  Small
 Normal  Small
 Barrel  Small
 46 35.4 - 37.0in
(90 - 94cm) 
 Slim  Small
 Normal  Small
 Barrel  Medium
 48  37.0 - 38.6in
(94 - 98cm)
 Slim  Small
 Normal  Medium
 Barrel  Medium
 50  38.6 - 40.2in
(98 - 102cm)
 Slim  Medium
 Normal  Medium
 Barrel  Large
52 40.2 - 41.7in
(102 - 106cm)
 Slim  Medium
 Normal  Medium
 Barrel  Large
54  41.7 - 43.3in
(106 - 110cm)
 Slim  Medium
 Normal  Large
 Barrel  Large
 56  43.3 - 44.9in
(110 - 114cm)
 Slim  Large
 Normal  Large
 Barrel  Large
 58  44.9 - 46.5in
(114 - 118cm)
 Slim  Large
 Normal  Large
 Barrel  X-Large
 60  46.5 - 48.0in
(118 - 122cm)
 Slim  Large
 Normal  Large
 Barrel  X-Large
 62  48.0 - 49.6in
(122 - 126cm)
 Slim  Large
 Normal  X-Large
 Barrel  X-Large
 64  49.6 - 51.2in
(126 - 130cm)
 Slim  X-Large
 Normal

 X-Large

 Barrel  -
 66  51.2 - 52.8in
(130 - 134cm)
 Slim  X-Large
 Normal  X-Large
 Barrel  -
 68  52.8 - 54.3in
(134 - 138cm)
 Slim  X-Large
 Normal  -
 Barrel  -

YOUTH BIONIC NECK SUPPORT

AgeChestChest ThicknessBNS Size
5  22.8 - 24.4in
(58 - 62cm)
 Slim  -
 Normal  2X-Small+
 Barrel  2X-Small+
6  24.4 - 26.0in
(62 - 66cm)
 Slim  2X-Small+
 Normal  2X-Small+
 Barrel  2X-Small
7 - 9  26.0 - 27.6in
(66 - 70cm)
 Slim  2X-Small+
 Normal  2X-Small
 Barrel  2X-Small
10 - 11  27.6 - 29.1in
(70 - 74cm)
 Slim  2X-Small
 Normal  2X-Small
 Barrel  X-Small
12 - 13 29.1 - 30.7in
(74 - 78cm)
 Slim  X-Small
 Normal  X-Small
 Barrel  X-Small
14 - 16 30.7 - 32.3in
(78 - 82cm)
 Slim  X-Small
 Normal  X-Small
 Barrel  X-Small

WAIST: Measured around the natural wasteline.

INSEAM: Measured from the crotch to the bottom of the leg.