In certain circumstances, a patient may need the addition of a heel lift or heel raiser to reduce stress on the Achilles tendon and lower leg structures, Equinus conditions etc. In the case of a limb length discrepancy being present, a heel lift may be applied under the device on the short side. These lifts are placed at the back and centre of the orthotic device extending forward until it finishes under the tarsal area (middle of the foot). Size UK Shoe Size Small 5 – 6.5 Medium 7 – 8.5 Large 9 – 10.5