Flexible measuring tapes are available at most craft, sewing, and big box stores.

This process can be done on your own if absolutely necessary. However, it is much easier to have an assistant.

When standing, your leg is not normally totally straight. Your knee should have a small bend that is about 30 degrees. If you have an injury that doesn’t allow you to put pressure on your leg, simply extend it as much as you can. Then take your measurements without the foot touching the ground.

Write down your measurements as you go.

Repeat this process below your knee as well. The distance you need to go from the knee cap varies by brace, so check with the manufacturer’s website to figure out what exact measurements are required. Having an upper and lower measurement will ensure that the support pieces of the brace you pick fit around your thigh and calf.

The measuring tape doesn’t need to be so tight that it cuts off your circulation. You simply want to make sure that it is getting a true measurement of the circumference of your leg.

There are usually links to size charts on web pages where you buy knee braces. So, if you have found a knee brace that you want to buy online, simply look at the web page for this type of link.

Some sizing charts only use the circumference of the knee, while others require several measurements to narrow down your correct size.

This is especially important if you have large thighs or calves, as the larger brace will likely fit your whole leg better.