Measurement Guide

above knee

Our Above Knee (AK) shape has been developed over the years to restore the appearance and silhouette of the leg, while allowing the wide variety of prosthetic knees available on the market to move freely. Our Above Knee prosthetic covers start at the top of the footshell and go to the apex of the knee unit, but do not cover the thigh. 

We have tried to make measuring as quick and intuitive as possible, needing only the length and circumference to manufacture the cover. This makes ALLELES Above Knee covers a low time investment option for many clinicians, and an exciting finishing touch for your clients!

Our Above Knee Covers require two main measurements: The Length and Circumference.

below knee

The ALLELES Below Knee (BK) cover has been developed over the past few years with feedback from clinicians and clients alike to provide what we call a “prosthetically correct” look that works with your clients socket geometry, and restores the silhouette of the leg. One of the main  benefits of an ALLELES BK cover is the ability for clinicians to make small modifications to the cover for a more customized fit.

We have tried to make measuring as quick and intuitive as possible, needing only the length and circumference to manufacture the cover. This makes ALLELES Below Knee covers a low time investment option for many clinicians, and an exciting finishing touch for their clients!

Our Below Knee Covers require two main measurements: The Length and Circumference.

AK length

The Length Measurement is taken from the apex of the knee unit, all the way down to the top of the footshell.

Using this as a starting point, remove half an inch to an inch to ensure that there will be a gap between the bottom of the cover & the top of the footshell. Typically, if the patient’s ankle is more dynamic, you will want to remove the full inch, whereas less mobile ankles will be fine with a half inch gap. The gap gives the prosthetic foot room to move without impacting range of motion. If the cover is too long, constant impact from the foot can crack the cover.

Keep in mind that the length measurement you provide will be the length that is manufactured, so please remove the gap before recording it in your order

AK circumference

For the Circumference Measurement, please measure the widest circumference of your patient’s sound limb (calf). This measurement will be used to create the outside circumference of your patient’s cover. 

If a patient is a bilateral amputee, please feel free to select a size that suits them.

These two measurements will be the basis of the cover, and further adjustments can be made to accommodate any particular needs your patient may have.

BK length

The Length Measurement is taken from the Patellar Bar area of the knee, all the way down to the top of the footshell.

Using this as a starting point, remove half an inch to an inch to ensure that there will be a gap between the bottom of the cover & the top of the footshell. Typically, if the patient’s ankle is more dynamic, you will want to remove the full inch, whereas less mobile ankles will be fine with a half inch gap.

Keep in mind that the length measurement you provide will be the length that is manufactured, so please remove the gap before recording it in your order

BK circumference

For the Circumference Measurement, please measure roughly 4-5 inches below the Patellar Bar.

If your client wears a suspension sleeve, please measure over top of the suspension sleeve as it does add to the overall circumference measurement.

To ensure that the cover sits properly around the socket, this measurement will be used to create the inside circumference of your patient’s cover. Remember the cover is a hard plastic shell going over a hard socket. While we have worked hard on the BK shape to create as little bulk as possible, if your patient’s socket is already larger than their sound limb, the cover may restore shape and encourage symmetry, but will add size to the socket