Find Your CTi®3 Size
Measure your leg, enter your measurements below, and our CTi®3 Size Finder will compare them with the sizing ranges to identify your closest match.
CTi®3 Size Finder
Enter your measurements below. Use inches only.
How to Measure
Use the three quick visuals below, then enter your measurements into the size finder above.
Knee Width
Measure straight across the center of the knee. This is the primary measurement used to determine CTi®3 size.
Thigh Circumference
Measure around the thigh 8 inches above the center of the kneecap.
Distal Patella
Measure around the leg at the distal-patella point below the knee.
CTi®3 Size Chart
All measurements below are in inches.
| Size | Knee Width | Thigh Circumference | Distal Patella |
|---|---|---|---|
| Small (S) | 3.5" – 4" | 15.7" – 18.5" | 11" – 13.4" |
| Medium (M) | 3.9" – 4.5" | 17.7" – 21.7" | 13.4" – 15" |
| Large (L) | 4.4" – 5" | 20.5" – 24" | 15" – 16.1" |
| X-Large (XL) | 4.9" – 5.5" | 22.8" – 26.4" | 16.1" – 17.3" |
Between Two Sizes?
Use knee width as the primary sizing measurement. Then compare thigh circumference and distal-patella circumference. If your measurements point toward different sizes, contact our CTi Sports Bracing Fit Specialists before ordering.
Helpful CTi®3 Videos
Quick videos covering the brace, measurement process, and strap adjustment.
CTi®3 Overview
A quick look at the CTi®3 brace and fit.
How to Measure
See how the CTi®3 sizing measurements are taken.
CTi®3 Strapping Tips
Properly secure and adjust your CTi®3 straps.
Found Your CTi®3 Size?
Choose your recommended size and select the correct left or right brace. If your measurements don't clearly match one size, contact us before ordering.
Shop Össur CTi®3
