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Gymshark shares a similar athleisure style and fits designed for both performance and leisure.
Under Armour
StyleAthleisure / SportswearStreetwear
Known forGymwear / activewear
Under Armour is a publicly traded American sportswear company (NYSE: UAA/UA) founded by Kevin Plank in 1996 and headquartered in Baltimore. It built its business on HeatGear and ColdGear compression base layers and now spans training, running, basketball, team sports and golf, with the Curry Brand signature line as its main footwear franchise. Founder Plank returned as CEO in April 2024 and is running a multi-year reset that cuts product volumes, reduces promotions and trims wholesale distribution. It also owns sustainability label Unless Collective, acquired in 2024.
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How Under Armour fits
| Category | Runs | Shape | Length | Size advice | Confidence |
|---|---|---|---|---|---|
| Hoodies & sweatshirts | slightly small | trim athletic fit through chest and sleeves, not boxy | regular, hits at the hip | Take your normal size for a close fit, or size up if you want to layer over a base layer or prefer a relaxed drape. | medium |
| Shirts & overshirts | true to size | golf and woven performance shirts run in a straight athletic cut rather than a dress-shirt cut | regular, tuckable | Order your usual size; go up if you carry width in the chest or shoulders, as the armholes can feel tight. | low |
| Trousers & pants | true to size | tapered joggers and slim-straight training/golf pants | inseams tend to run long, especially in joggers | Stick with your normal waist size but check inseam options, since the legs are frequently reported as long. | medium |
| Jackets | slightly small | athletic, close through the chest and sleeves with limited room for bulky layers | regular | Consider sizing up if you plan to wear a hoodie or thick midlayer underneath. | medium |
| T-shirts & graphic tees | runs small | Fitted and Compression styles cling to the torso; Loose styles are closer to a regular athletic cut | regular to slightly long body, often longer sleeves than average | Size up one in Fitted/HeatGear compression tees; stay true to size in the Loose/Tech line if you want a normal T-shirt feel. | high |
Does Under Armour run big or small?
Under Armour fits slightly small. Most people are safest taking their usual size in 'Loose' fit and going up one size in anything labelled 'Fitted' or 'Compression'. Under Armour uses its own Compression / Fitted / Loose labelling, and shoppers commonly report the athletic cut runs snugger than mainstream US sportswear, so a size up is a frequent recommendation for anyone who isn't slim-built.
How does Under Armour fit?
Under Armour uses its own Compression / Fitted / Loose labelling, and shoppers commonly report the athletic cut runs snugger than mainstream US sportswear, so a size up is a frequent recommendation for anyone who isn't slim-built. Overall shape: athletic and body-following, with a defined chest and trim waist across most tops.
How do Under Armour hoodies & sweatshirts fit?
Under Armour hoodies & sweatshirts fits slightly small. Take your normal size for a close fit, or size up if you want to layer over a base layer or prefer a relaxed drape. Shape: trim athletic fit through chest and sleeves, not boxy.
How do Under Armour shirts & overshirts fit?
Under Armour shirts & overshirts fits true to size. Order your usual size; go up if you carry width in the chest or shoulders, as the armholes can feel tight. Shape: golf and woven performance shirts run in a straight athletic cut rather than a dress-shirt cut.
How do Under Armour trousers & pants fit?
Under Armour trousers & pants fits true to size. Stick with your normal waist size but check inseam options, since the legs are frequently reported as long. Shape: tapered joggers and slim-straight training/golf pants.
Directional fit consensus summarized from public sources with AI — a starting point, not a guarantee. Confirm with the product's own measurements before buying.
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