Finding the right gear shouldn't be a guessing game, so checking a reliable ua compression shorts size chart before you buy is the best way to avoid that awkward "too tight to breathe" feeling. We've all been there—ordering a pair of shorts online, waiting for the package to arrive, and then realizing you basically need a shoehorn and a prayer to get them over your thighs. Under Armour is famous for that second-skin feel, but if you get the sizing wrong, that "second skin" can quickly start feeling like a straitjacket.
The thing about compression gear is that it's supposed to be tight. That's the whole point. It's designed to support your muscles, improve blood flow, and keep everything in place while you're sprinting, lifting, or just trying to survive a leg day. But there's a very fine line between "supportive" and "restricting circulation." To help you navigate that line, let's break down how to read the charts and what you need to know about how these shorts actually fit in the real world.
Why Getting the Right Fit Matters So Much
Before we dive into the numbers, let's talk about why you're even looking for a ua compression shorts size chart in the first place. If your shorts are too loose, they aren't doing their job. You'll deal with bunching, sliding, and—the absolute worst—chafing. If they're too tight, you're looking at pinched skin, restricted range of motion, and fabric that wears out way too fast because it's being stretched past its limit.
Compression is all about muscle stabilization. When you're moving fast, your muscles vibrate. That vibration leads to fatigue. Good compression shorts dampen that vibration, which theoretically helps you recover faster and perform better. But if the waistband is digging into your gut or the leg openings are cutting off your quad pump, you're not going to be thinking about "muscle stabilization"—you're going to be thinking about how soon you can take them off.
How to Measure Yourself Properly
You can't just guess your size based on what jeans you wear. Clothing brands are notorious for "vanity sizing," where a size 34 waist is actually 36 inches. Athletic gear is usually much more literal. To get the best results from a ua compression shorts size chart, you need two main measurements: your waist and your hips.
The Waist Measurement
Find the narrowest part of your torso. This is usually right around your belly button or slightly above it. Don't suck your stomach in—nobody is looking! Keep the tape measure snug but not digging in. If you're someone who carries a bit more weight in the midsection, make sure you measure where the waistband of the shorts will actually sit.
The Hip Measurement
This one is often skipped, but it's arguably more important for compression shorts. Wrap the tape measure around the fullest part of your hips and glutes. Since compression shorts have to slide up over your legs and butt, this measurement determines whether you'll even be able to get the shorts on. If you have a "lifter's build" with larger glutes and quads, you might find that your hip measurement puts you in a larger size than your waist does. In that case, always go with the larger size.
Breaking Down the UA Compression Shorts Size Chart
Most UA charts break things down by standard sizes (S, M, L, XL, etc.). Here is a general look at how those sizes usually translate to inches for men:
- Small: Waist 28–29 inches
- Medium: Waist 30–32 inches
- Large: Waist 34–36 inches
- XL: Waist 38–40 inches
- XXL: Waist 42–44 inches
For women, the measurements usually focus on the waist and the widest part of the hips:
- XS (0-2): Waist 23–25", Hips 33–35"
- Small (4-6): Waist 25–27", Hips 35–37"
- Medium (8-10): Waist 27–30", Hips 37–40"
- Large (12-14): Waist 30–33", Hips 40–43"
- XL (16): Waist 33–36", Hips 43–46"
Keep in mind that these are general ranges. UA often updates their cuts, and different "lines" of shorts might feel different even if the chart says they're the same size.
HeatGear vs. ColdGear: Does the Fit Change?
This is a question that pops up a lot. Under Armour has two main technologies: HeatGear (for when it's hot) and ColdGear (for when it's cold).
HeatGear is usually thinner and more breathable. It feels very slick and has a lot of "snap-back" elasticity. When you look at a ua compression shorts size chart for HeatGear, the fit is usually true to the numbers, but the fabric is very forgiving.
ColdGear, on the other hand, is a bit thicker. It often has a brushed interior to trap heat. Because the fabric is heavier, it sometimes feels "tighter" even if the dimensions are exactly the same. If you're right on the edge of two sizes, many athletes prefer to size up in ColdGear just to have a bit more breathing room through the thicker material.
What if You're Between Sizes?
This is the eternal struggle. Your waist says Medium, but your quads are screaming for a Large. If you find yourself stuck between two spots on the ua compression shorts size chart, here is a simple rule of thumb: Go with the larger size.
Modern compression fabrics are incredibly stretchy. A slightly "loose" compression short is still going to be tighter than a regular pair of gym shorts. However, a "too small" compression short will go sheer (the dreaded "see-through" look) and the seams will eventually fail. Plus, if they're too tight, they'll tend to roll down at the waist or ride up at the legs, which is a total nightmare when you're mid-run.
The "Squat Test" and Long-Term Wear
Once you've used the ua compression shorts size chart and your order arrives, don't just rip the tags off. Put them on and do a few air squats. Walk around the house. You want to make sure the waistband stays put. If it's sliding down your lower back when you squat, the size is likely too small, and the fabric is pulling the waistband down as it stretches over your glutes.
Also, think about how they'll hold up. Over time, all elastic fabrics lose a tiny bit of their "oomph" after dozens of washes. If they feel borderline loose right out of the box, they're definitely going to be too big after a month of heavy use. You want them to feel "comfortably snug"—like a firm hug, not a tourniquet.
Real-World Feedback: Do They Run Small?
If you spend any time reading reviews, you'll see a lot of people saying Under Armour runs small. It's important to take this with a grain of salt. A lot of people aren't used to how compression is supposed to feel. They might be comparing the fit to a pair of casual cotton boxers or loose basketball shorts.
However, compared to some other big-name athletic brands, UA does tend to have a "performance" cut. This means they're often slimmer through the thighs. If you're someone with a thicker build, checking that ua compression shorts size chart specifically for the hip measurement is your best bet to ensure a good fit.
Taking Care of Your Compression Gear
Once you've found your perfect size, you'll want to make those shorts last. Heat is the enemy of elastic. Even the best-fitting shorts will turn into a saggy mess if you toss them in a high-heat dryer every week. To keep the compression "compressive," wash them in cold water and hang them to dry. It sounds like a hassle, but it'll keep that fit you worked so hard to find for a lot longer.
Final Thoughts
At the end of the day, a ua compression shorts size chart is a tool, not a law. Everyone's body is shaped differently, and how you like your gear to feel is a personal preference. Some people want that "locked-in" feeling for max support, while others just want a light layer to prevent chafing.
Take your measurements, be honest about your size, and don't be afraid to try a couple of different options if you're unsure. Once you find that perfect fit, you'll realize why so many people swear by them—it really does make a difference in how you feel during a tough workout. Happy training!