How to Choose a Knee or Back Brace: Types and Sizing Basics

Knee and back braces run from a light knitted sleeve to a hinged frame with adjustable stops. The right one depends on what the brace has to do, how and where it will be worn, and whether it matches the wearer's measurements. This guide walks through the main types, explains how brace sizing usually works and finishes with a short checklist.

We sell braces, not medical advice. If a brace was suggested after surgery, for a specific problem or as part of a care plan, talk to your clinician about the type, the size and how long to wear it. Some braces need a prescription or a professional fitting, and your clinician can tell you whether yours does.

What types of knee braces are there?

Sleeves and knitted supports

A sleeve pulls on over the foot and sits around the knee with even compression. It is the lightest style and usually fits under loose trousers. Some sleeves add a ring or pad around the kneecap. The medi Genumedi Knee Support, for example, keeps a silicone ring in a pocket on the inside, over the kneecap, and has silicone dots along the top edge to help it stay put. Neoprene sleeves such as the Össur Formfit Neoprene Knee Sleeve are sold with an open or a closed patella, so you can choose whether the front of the knee is covered.

Wraparound and hinged braces

Wraparound braces open flat and close with straps, which helps when pulling a sleeve over the foot is awkward. Hinged braces add rigid side bars with a hinge at the knee, and many allow extension and flexion stops that limit how far the knee straightens or bends. The Össur Rebound Hinged Knee Brace (ROM) comes as a sleeve or a wrap, each in a long or short length, and ships with extension and flexion stop kits. Stop settings should come from your clinician rather than guesswork at home.

Unloader and post-op braces

Two more groups are normally chosen with professional input. Unloader braces, listed in our OA knee braces collection, are a specialized hinged design that is normally prescribed and fitted. Post-op braces, in our post-op braces collection, are long hinged braces with range-of-motion controls. Talk to your clinician before buying either type, because the model, the settings and the fit belong to the care plan.

Össur's CTi®3 sports brace has its own measuring and ordering steps, which our CTi®3 knee brace guide explains.

What types of back braces and supports are there?

Soft lumbar supports and belts

Soft supports wrap around the lower back and fasten at the front. They are made from elastic, knit or neoprene, and many have flexible stays sewn into the back panel. The medi Lumbamed Basic is a flat-knit lumbar support with spring stays in the back and hand loops in the closure that make it easier to pull snug. It is offered in a men's cut and a women's cut. Work belts and sacroiliac belts are other soft styles; a sacroiliac belt sits lower, around the hips.

LSO braces

LSO stands for lumbar sacral orthosis. An LSO is firmer than a soft support and usually combines front and back panels, stays and a pulley or cable system for tightening. The Aspen Horizon 631 LSO has a low profile for wear under clothing, and the top and bottom of the brace tighten separately. It is one size, adjustable for waists of 24 to 50 inches, and the listing gives a larger range when extension panels are used. LSOs are often suggested after a specific event or procedure, so talk to your clinician about whether one fits your plan and how firmly to wear it.

Posture supports

Posture supports and figure-8 straps draw the shoulders back lightly as a reminder to sit or stand tall. Think of them as comfort and positioning products, and ask a professional if you are unsure whether one suits you.

How do knee and back brace types compare?

The table sums up the styles described above. Charts vary between brands, so always measure against the chart on the product page.

Other braces: ankle, wrist, elbow and shoulder

The same ideas carry over to smaller braces. Ankle sleeves and stirrups, wrist and thumb splints, elbow straps and shoulder slings all come in soft and rigid versions, and many are made for the left or the right side. Browse our ankle supports, wrist supports and arm supports, then follow the sizing steps below.

How is a brace sized?

Most braces are sized by a body measurement rather than by clothing size. Each manufacturer publishes its own chart, and charts vary between brands, so always compare against the chart on the product page you are looking at.

• Knee sleeves and supports. Charts often ask for thigh and calf measurements a set distance above and below the kneecap, taken with the leg straight. medi sizes the Genumedi from I to VII and adds Extra-Wide versions for fuller thighs.
• Hinged knee braces. These are often sized by thigh measurement. The Rebound ROM lists sizes XS to 4XL for thighs from 11.5 to 32 inches.
• Back supports and LSOs. Usually measured around the waist or the hips at the height where the brace will sit, over thin clothing. Check which one the chart wants.
• Ankle and wrist braces. Often sized by shoe size or by ankle or wrist measurement, and some are sold by side.

Use a soft tape measure, keep it level and snug without pulling tight, and write the number down. If you fall between two sizes, look for the manufacturer's note on the product page or call us before you order. A brace that is too loose tends to slide, and one that is too tight is uncomfortable to wear, so the fit matters more than the size label.

How do you wear and care for a brace?

• Follow the manufacturer's instructions for putting the brace on, and practice a few times so the straps land in the same place each day.
• Many soft supports can be hand washed and air dried. Read the care label first.
• Some models have replacement straps, pads and liners. Our knee braces collection lists several for the Össur CTi range.
• If anything about the fit or the feel of a brace worries you, take it off and contact your clinician.

Checklist before you buy

• Choose the area and the type: sleeve, wrap, hinged, soft lumbar support or LSO.
• Ask your clinician whether the brace needs a prescription, a fitting or specific settings.
• Measure with a soft tape at the points the size chart names.
• Compare your numbers with the chart on that product page, not a general chart.
• Check the side, length and patella options where they are offered.
• Read our returns policy before ordering. Most items have a 30-day return window and a 20% restocking fee.

Talk to us

Not sure which style or size to choose? Call 1-877-861-8000, Monday to Friday, 9 AM to 6 PM Pacific, or email contactus@medsupplynow.com. Free US shipping applies to orders of $50 or more. You can browse every brace in our bracing and support collection, or go straight to knee braces or back braces and supports.

Related guides

You may also find these useful: Össur CTi®3 knee brace guide and home exercise and rehab equipment. For every topic we cover, see the buyer's guide hub.

Frequently asked questions