DonJoy Armor is a prefabricated rigid knee brace with an aircraft-grade aluminum frame, a swooping thigh cuff, hinged uprights, padded cuffs, and internally mounted straps. The Armor range includes distinct FourcePoint and Standard hinge versions, with separate left-leg and right-leg models and short or standard calf lengths. The gallery shows the Armor FourcePoint standard-calf right-leg version from two angles. BFY can help confirm the specific model and its sizing details.
Aircraft-grade aluminum frame with a manufacturer-listed thickness of 0.125 inches.
Swooping thigh cuff and internally mounted straps.
The FourcePoint version has a low-profile hinge and steel-reinforced hinge plate.
FourcePoint ACL models: short calf, right 11-1440-x and left 11-1441-x; standard calf, right 11-1442-x and left 11-1443-x.
Standard hinge ACL models: short calf, right 11-1004-x-26000 and left 11-1005-x-26000; standard calf, right 11-1444-x and left 11-1445-x.
Standard hinge CI strap-configuration models: short calf, right 11-1029-x-26000 and left 11-1030-x-26000; standard calf, right 11-1447-x and left 11-1448-x.
The regional Armor range also lists PCL short-calf models: right 11-1025-x-26000 and left 11-1026-x-26000. BFY can confirm the specific model and availability.
Product details and sizing stay here with BFY. This showcase is educational; your clinician guides product selection and use.
BFY / SIZING & FIT
Find your fit.
Product sizing information stays here with Befitting You. Our team can help confirm measurements and fitting requirements.
Sizing is partially verified across the Armor range. The FourcePoint ACL brochure uses thigh circumference 15 cm above mid-patella; the Standard hinge guide uses thigh and calf measurements 6 inches above and below knee center, with a knee-center column. The Standard hinge XXXL row is withheld because its metric thigh range conflicts between published Armor sources. Contact BFY to confirm the hinge version, left or right model, calf length, and measuring guide, especially for XXXL or regional PCL models.
Armor FourcePoint ACL — thigh circumference
11-1440-x / 11-1441-x / 11-1442-x / 11-1443-x
Measurement: Measure thigh circumference 15 cm above mid-patella (the midpoint of the kneecap). This FourcePoint chart uses the thigh measurement only; it does not specify knee-center or calf ranges.
This chart is specific to the listed Armor FourcePoint ACL models; the measurements are not substituted from another brace design.
The 15 cm measurement position and both sets of ranges are reproduced as published; no unit conversions have been calculated.
The x in each part number is the size code shown in the first column.
The separate Standard hinge chart uses a different published measuring method. Do not treat 15 cm and 6 inches as interchangeable instructions; BFY can help confirm the appropriate guide for your model.
Armor Standard hinge — three-point circumference chart (XS–XXL verified)
Measurement: Use a flexible tape measure. Stand with legs shoulder-width apart, knees slightly bent, and leg muscles contracted. Measure thigh circumference at a point 6 inches above the center of the knee and calf circumference at a point 6 inches below the center of the knee. The chart also gives knee-center circumference ranges; measure around the knee at its center. The published written guide does not separately describe the knee-center tape placement in further detail; BFY can assist with this measurement.
Armor Standard hinge — three-point circumference chart (XS–XXL verified) — sizing reference
Size
Thigh circumference (inches; cm)
Knee-center circumference (inches; cm)
Calf circumference (inches; cm)
XS
13–15.5 in (33–39 cm)
12–13 in (30–33 cm)
10–12 in (25–30 cm)
S
15.5–18.5 in (39–47 cm)
13–14 in (33–35 cm)
12–14 in (30–35 cm)
M
18.5–21 in (47–53 cm)
14–15 in (35–38 cm)
14–16 in (35–40 cm)
L
21–23.5 in (53–60 cm)
15–17 in (38–43 cm)
16–18 in (40–45 cm)
XL
23.5–26.5 in (60–67 cm)
17–19 in (43–48 cm)
18–20 in (45–50 cm)
XXL
26.5–29.5 in (67–75 cm)
19–21 in (48–53 cm)
20–22 in (50–55 cm)
This is the Armor Standard hinge chart, not the FourcePoint brochure's thigh-only chart.
XXXL is omitted from this chart because the published Armor sources disagree on its metric thigh upper limit. Contact BFY for confirmation rather than selecting from an unresolved range.
Inch and centimeter ranges are retained as published; no conversions or intermediate sizes have been invented.
The regional PCL short-calf models are not assigned this chart without confirmation of the applicable regional measuring guide.
BFY can assist when measurements fall across different size rows or when the model is uncertain.
Sizing is a product reference, not a treatment recommendation or a guarantee of fit. If you are between ranges or unsure of a measurement, talk with BFY before choosing a size.
