Knee sleeves are sized at the knee. Not up at your quad, not down at your shin. The measurement that matters most is the circumference across the center of your kneecap, taken with your leg straight.
Measure in the wrong spot, or skip the tape and guess, and you either get a sleeve that slides down your shin by your third set of squats, or one that takes five minutes and a towel to get on.
Here's how to take the measurement, compare UPPPER's size charts for the 2.0 and 3.0 sleeves, and check the fit before your first working set.
What You'll Learn
- Why a knee sleeve only works when the size is right
- How to measure your knee in 5 steps
- UPPPER's size charts for the 2.0 and 3.0 knee sleeves
- How the 2.0 and 3.0 compare on length, size range, and price
- The signs your sleeves are too big or too small, and how to get them on
Why Knee Sleeve Sizing Matters
Knee sleeves work through compression and warmth. A snug 7mm neoprene sleeve keeps the joint warm between sets and gives you steady pressure around the knee, which helps it feel stable and locked in as you go into your squats and lunges. This only happens when the sleeve actually fits your leg.
Here's what goes wrong at each end:
- Too loose: no real compression. The sleeve bunches behind the knee when you hit depth and slowly migrates toward your ankle between sets.
- Too tight: getting it on becomes its own workout; it pinches behind the knee at the bottom of a squat, and it can leave your lower leg feeling numb or tingly after a long session.
A sleeve that doesn't fit isn't support. It's just a leg warmer.
How to Measure Your Knee for Knee Sleeves
Grab a soft tape measure and run through these five steps:
- Straighten your leg. Stand with your leg fully extended while measuring your knee. Don't measure seated or with a bent knee, since that can change the measurement.
- Find the center of your kneecap. Wrap the tape around your knee right across the middle of the kneecap, level all the way around.
- Keep the tape snug, not tight. Flush against your skin with no slack, but not pulled hard enough to dent the skin.
- Measure bare skin. Not over leggings or shorts. Your sleeve sits on skin, so measure on skin.
- Measure both knees. If one reads bigger, size off the bigger knee.
That number is what you match to the chart. Write it down in both inches and centimeters if your tape has both.
UPPPER Knee Sleeve Sizing Charts
UPPPER runs two size charts, one for the 2.0 knee sleeves and one for the 3.0. The 3.0 was rebuilt with a new construction and an expanded size range. Make sure you match your measurement to the correct chart for the version you're buying.
Knee Sleeves 3.0 Sizing
| Size | Knee (inches) | Knee (cm) |
|---|---|---|
| S | 12.2-13.4 | 31-34 |
| M | 13.4-14.6 | 34-37 |
| L | 14.6-15.8 | 37-40 |
| XL | 15.8-16.9 | 40-43 |
| 2XL | 16.9-18.5 | 43-47 |
| 3XL | 18.5-20.1 | 47-51 |
The UPPPER Knee Sleeves 3.0 are 7mm neoprene with a durable nylon outer, reinforced stitching, and a patent-pending construction. They're cut longer than the 2.0 (10.75" in the front, 8.3" in the back), so they cover more of the joint, and they're the only UPPPER sleeves that go up to 3XL.
Knee Sleeves 2.0 Sizing
| Size | Knee (inches) | Knee (cm) |
|---|---|---|
| S | 12-13.25 | 31-34 |
| M | 13.25-14.5 | 34-37 |
| L | 14.5-15.5 | 37-40 |
| XL | 15.5-16.75 | 40-43 |
| 2XL | 16.75-18 | 43-46 |
The 2.0 sleeves are the same 7mm neoprene and come in the widest colorway lineup, from Black to Lavender to Baby Blue. One thing to know before you order: the Black 2.0 runs slightly small, so size up one full size from what the chart gives you.
Knee Sleeves 2.0 vs. 3.0: Which Fit Works for You
Both versions are 7mm neoprene and both are sold as a pair. Where they differ is length, size range, and price.
| Feature | Sleeves 2.0 | Sleeves 3.0 |
|---|---|---|
| Thickness | 7mm neoprene | 7mm neoprene |
| Length | 9.5" front / 7" back | 10.75" front / 8.3" back |
| Size range | S-2XL | S-3XL |
| Price | $45 | $50 |
Bottom line: if you want more coverage above and below the joint, or your knee measures over 18", the 3.0 is your sleeve. If you want a specific colorway or you already know your size in the 2.0, it still does the job. For which lifts get the most out of a sleeve, see Top 5 Exercises That Benefit From Knee Sleeves.
Signs Your Knee Sleeves Are the Wrong Size
Most of these show up in your warm-ups.
Too big:
- The sleeve slides down your shin while you walk back to the rack
- Fabric bunches up behind the knee at the bottom of a squat
- You feel almost no pressure once it's on, like wearing a sock on your knee
Too small:
- It takes real effort and several minutes to pull on, every time
- It pinches hard behind the knee when you hit depth
- Your calf or foot feels tingly or numb after you've worn it for a while
- The top edge digs a deep ring into your quad
If your measurement lands between two sizes, size up. Your sleeve should feel snug from top to bottom: a touch tight around your quad is fine, sliding down your shin isn't, and if you can't get it past your calf, it's too small.
Sleeves that go on hard aren't always the wrong size, though. A correctly sized 7mm sleeve is supposed to take some effort. The trick: turn it inside out, slide it up to your shin, then roll the top half up over your knee. Center it on the kneecap so the compression lands on the joint, not your quad or shin.
Frequently Asked Questions
What size knee sleeves should I get?
Your knee sleeve size comes from the circumference of your knee at the center of the kneecap, measured with your leg straight. Match that number to the chart for the specific sleeve you're buying.
How tight should knee sleeves be?
Knee sleeves should be snug enough that they stay in place through a full squat without sliding, but not so tight that they pinch or cut off circulation. You should feel firm, even pressure around the whole joint. If your lower leg goes numb or tingly, they're too tight.
Should I size up or down on knee sleeves?
Size up if you're between two sizes. A slightly snug sleeve still works, but one that's too small is a struggle to get on and uncomfortable to train in. If you're ordering Black 2.0 sleeves, size up one full size from your chart size, since that colorway runs small.
Do UPPPER 2.0 and 3.0 knee sleeves fit the same?
Mostly, but not exactly. The 3.0 uses an updated fit, so don't assume your size in the 2.0 will be the same in the 3.0. Check the 3.0 chart against your measurement before you order. The 3.0 also comes in 3XL and is cut longer for more coverage above and below the knee.
Are knee sleeves supposed to be hard to put on?
Yes, a correctly sized 7mm knee sleeve takes some effort to put on. Thick neoprene is built to compress, so it won't slide on like a pair of socks. Turn the sleeve inside out, pull it up to your shin, then roll it up over the knee. If it still takes several minutes every time, size up.
Will knee sleeves stretch out over time?
Neoprene loosens up a little with regular use, but a correctly sized sleeve won't stretch into a different size. That's another reason to size off your actual measurement and not size down hoping they'll break in. Lifters training year-round in warm, humid cities like Miami and Houston will sweat through sleeves fast, so air-dry them between sessions instead of leaving them balled up in your gym bag.
Do knee sleeves fix knee pain?
No, knee sleeves don't fix the cause of knee pain. They add warmth and compression that can make the knee feel more stable and comfortable under load, but if your knees hurt every time you squat, don't rely on knee sleeves to push through the pain. It's worth finding out what's causing it. Start with Knee Pain When Squatting to learn about possible causes.
Get the Fit Right, Then Let It Work
A sleeve that fits stops being something you think about. It's on, it's locked in, and the only thing on your mind is the next rep.
You train legs heavy and often, and you want your knees warm and supported through every squat, lunge, and split squat. That only works when the size matches your knee.
Measure once, measure right: leg straight, tape across the center of the kneecap, match the chart.
