Under Armour is the American sportswear company founded with a simple aim: to deal with sweat as you exercise. From small beginnings, Under Armour is now a multi-billion pound company, operating worldwide and becoming a watchword for meticulously researched design and impeccably constructed pieces. Founder Kevin Plank is still very much in charge, even as the company he first imagined almost three decades ago has grown to rival the established names such as Adidas and Nike.

It was back in 1996 that Plank, a former American football player, founded Under Armour - the name was his brother’s idea - precisely because of sweat. He was a fullback on his team and found that cotton sportswear was rather less than good at wicking sweat. Research led him to synthetic fabrics and the first Under Armour t-shirts were made, soon followed by national attention from American sportspeople - and swift ranges of moisture-wicking pieces hurriedly designed and made by competitors.

Under Armour sizing notes

Under Armour are the originals in this market. They have their own system of sizing which, once you understand how it works, fits true to your usual size. Naturally, being sports-oriented, it’s important to get your size absolutely right to get the most out of your sport or daily exercise. Use our Under Armour size charts to find your perfect fit.

Under Armour size charts

Men's tops

SizeChest (cm)
XS76 - 81
S86 - 91
M96 - 102
L106 - 112
XL116 - 122
XXL116 - 12
3XL133 - 137
4XL138 - 142
5XL143 - 147

Men's bottoms

SizeWaist (cm)
XS67 - 70
S71 - 73
M76 - 81
L86 - 92
XL96 - 101
XXL106 - 111
3XL112 - 116
4XL117 - 121
5XL122 - 127

Women's tops

SizeBust (cm)
XS79 - 84
S85 - 90
M91 - 96
L98 - 103
XL104  - 109
XXL112 - 117

Women's bottoms

SizeWaist (cm)
XS58 - 64
S65 - 70
M71 - 76
L78 - 83
XL84 - 89
XXL91 - 97
3XL97 - 107
4XL107 - 117
5XL117 -130

Find your Adidas fit with our ultimate Adidas sizing guide.