What Size Knee Pads Do I Need? A Sizing Guide

How to measure for knee pads

Sizing starts with a soft tape measure and two numbers. Most brands ask for the distance around your leg above the knee and below it, and some also ask for the knee itself. The NOCRY listing on our comparison page, for example, tells buyers to measure 4 inches above and 4 inches below the knee.

Measure while you stand relaxed, then check the number again in a crouch. Skin and muscle shift when you bend, and the second reading shows how much room the straps need. Wear the thin clothing you plan to work or play in, since thick work pants add bulk.

• Stand straight with your weight even on both feet.
• Wrap the tape around the thigh about 4 inches above the center of the kneecap. Keep it flat and snug, not pinched.
• Write the number down, then wrap the tape around the calf about 4 inches below the kneecap.
• Crouch and repeat both measurements. Note any big change.
• Measure both legs. If they differ, size to the larger one.

How to read a size chart

Brands that sell small, medium and large pads usually tie each size to a thigh or leg range. Find your measurement in the chart and pick the size whose range contains it. If you fall between two sizes, think about how you will use the pads.

For long kneeling jobs, many people prefer the larger size with the straps pulled snug, because it spreads pressure and is less likely to cut in. For sports where you dive or slide, a snug fit matters more, so the smaller size often makes sense.

Do not compare sizes across brands. A medium from one maker can fit very differently from a medium made by another. Always use the chart on the exact product page.

How sizing works on the pads we compare

Most work knee pads skip sizes altogether and rely on adjustable straps. That makes the strap range the number to check. Our best knee pads page lists six products, and only one of them publishes measurements.

The NOCRY GelGuard Pro lists a thigh range of 15.7 to 18.9 inches and a shin range of 17.7 to 21.3 inches. If your measurements fall outside those ranges, look for extension straps instead. That is also why we named it the clearest sizing guide on the page.

What size knee pads for volleyball?

Volleyball pads are a different product from work pads. They are slim, low-profile and usually slip on like a sleeve, so there is no strap to loosen. That means the size chart matters even more.

Measure around the leg as the brand directs, usually just above or across the knee, and choose the size that matches. The pad should feel snug and stay in place when you drop into a defensive stance or dive. If it slides down during play or rolls at the edges, it is too big. If it pinches behind the knee or leaves deep marks, it is too small.

Check the range of motion before you play. Squat, lunge and sit in a low stance. The pad should not bunch up behind the knee or limit how far you can bend.

Sizing for kids: ages 8, 10 and 14

Age is a poor guide to size. Two 10-year-olds can have very different leg measurements, so measure the child the same way you would an adult and use the brand's youth or small sizes.

An 8-year-old or 10-year-old will often fit a youth size, but check the chart rather than trusting the label. Children grow quickly, and a pad that fits well now may be too tight soon. Adjustable straps give a little more room, though a pad that is far too large will slide and stop protecting.

A 14-year-old may already fall into adult small or medium ranges, especially if they have grown a lot. Measure first, then decide between youth and adult sizing. Teens in sports with frequent contact often do best with a snug fit and a pad designed for the sport.

• Measure both legs and use the larger number.
• Have the child crouch and jump while wearing the pad to check it stays put.
• Re-measure at the start of each season.

Signs the fit is right, and safety notes

Once the pads are on, give them a quick check. A good fit does not need constant adjusting.

Fasten the straps so the pad sits centered over the kneecap. Walk, crouch and kneel for a few minutes. If the pad shifts down toward the shin, tighten the straps or move to a smaller size. If your foot tingles, your skin looks pale, or your leg feels numb, loosen the straps right away. Straps that are too tight can restrict blood flow.

Wear pads that match the job. If you work around nails, glass or gravel, choose a hard shell cap, since padding alone will not stop sharp debris. On finished floors, a non-marring cap helps protect the surface.

Take breaks during long kneeling sessions, stand up and stretch, and check the straps for wear. Frayed straps and cracked caps are reasons to replace the pads. Knee pads reduce pressure but they do not make unsafe working conditions safe, so keep the work area clear of tools and cords you could trip over when you stand.

Frequently asked questions

Should I size up or down if I am between sizes?

It depends on use. For long kneeling jobs, the larger size with snug straps is often more comfortable. For sports with diving or sliding, the smaller size usually stays in place better.

Do I need to measure both knees?

Yes. Legs are often slightly different. Measure both and choose the size that fits the larger one, then adjust the straps on the smaller side.

Can I wear knee pads over pants?

For most work pads, yes, and many people prefer it for comfort and strap placement. Just measure over the same clothing you plan to wear so the straps fit correctly.

What if my legs are larger than the size range?

Look for pads that include extension straps. Two of the products on our comparison page, the GRENPRO and the Thunderbolt, list extension straps, and the GRENPRO lists them at 7 inches.

How tight should the straps be?

Snug enough that the pad does not slide when you crouch, but loose enough that you can slip a finger under the strap. If you feel tingling or numbness, loosen them.