Knee Orthosis Sizing
Just two quick measurements and you can select a standard size from this chart.
Follow these instructions, using the table below, to select the correct standard size knee orthosis.
For a custom knee orthosis, use the second table to select separate cuffs, bars and pads.
All knee orthoses, standard size and custom sized, are supplied fully assembled and ready to fit. All include fitting instructions.
1. Measure mid-thigh circumference.
This is the proximal cuff measurement
2. Measure mid-calf circumference.
This is the distal cuff measurement
3. This Measurement is for a custom Orthoses only: Measure from mid-thigh to mid-calf in fullest possible extension
position. This measurement is the Side Bar length ("L").
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Standard Sizes Item # Circumference Mid Calf (Inches) Circumference Mid-Thigh (Inches)
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Large
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KE001
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15" - 17"
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19" - 21"
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Medium
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KE002
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13" - 15"
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17" - 19"
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Small
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KE003
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11" - 13"
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15" - 17"
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Junior
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KE004
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9" - 11"
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13" - 15"
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Child
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KE005
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7" - 9"
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11" - 13"
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Components of the serial orthosis are shown below, labelled to show measurements.
 
To create a custom ADA Flex Serial Knee Orthosis
Select the components from the following table. Each Knee Orthosis requires a calf (distal) and an thigh (proximal) cuff, based on the measurements of "B" and "A" respectively. Each also requires two sidebars, based on the measurement of "L", and a knee pad. The unit is supplied fully assembled and includes fitting instructions.
Individual Components for Custom Orthosis Sizes
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Cuffs
(One each of Proximal "A" or Distal "B" required. Screws included.)
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Part #
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"A" or "B"
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inches
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cm.
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CUFF10
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10
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25
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CUFF9
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9
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23
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CUFF8
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8
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20
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CUFF7
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7
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18
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CUFF6
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6
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15
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CUFF5
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5
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13
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CUFF4
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4
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10
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CUFF3
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3.5
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9
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Sidebars
(Sold in Pairs)
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Part #
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"L"
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inches
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cm.
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BAR15
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15
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38
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BAR13
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13
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33
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BAR11
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11
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28
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BAR09
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9
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23
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BAR07
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7
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18
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BAR05
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5
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13
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Knee Pads
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Part #
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"b"
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"c"
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inches
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cm.
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inches
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cm.
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PAD60
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6
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15
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7
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18
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PAD50
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5
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13
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6.5
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17
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PAD45
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4.5
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12
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6
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15
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PAD40
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4
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10
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5
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13
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PAD35
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3.5
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9
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4
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10
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