--- title: Galileo SMO Measurement Instructions description: SMO Measurements --- [Skip to content](https://www.help.protosthetics.com/galileo/galileo-smo-measurement-instructions-products#main-content) English Show submenu for translations ![ProtostheticsGalileo Logo](https://www.help.protosthetics.com/hubfs/ProtostheticsGalileo%20Logo.svg) Open main navigation Close main navigation - English Show submenu for translations - [Contact us](https://www.help.protosthetics.com/galileo/contact-us) [Contact us](https://www.help.protosthetics.com/galileo/contact-us?hsLang=en) How can we help you? - There are no suggestions because the search field is empty. 1. [Galileo by Protosthetics](https://www.help.protosthetics.com/galileo?hsLang=en) 2. [Galileo Product Options](https://www.help.protosthetics.com/galileo/galileo-product-options?hsLang=en) 3. [Orthotic Products](https://www.help.protosthetics.com/galileo/galileo-product-options?hsLang=en#orthotic-products) February 3, 2026 # Galileo SMO Measurement Instructions The numbers of the measurements given here correspond to those on the order form. 1\. **Horizontal AP at Medial Malleolus\*:** \*This is a measurement unique to Galileo SMO, so it's important! At the Height of the Medial malleolus, measure the distance between the anterior and posterior sides of the limb.\![Horizontal AP at Medial Malleolus](https://storage.crisp.chat/users/helpdesk/website/-/b/b/6/1/bb61eef0a8622800/image_r88j5o.png) 2\. **Circumference from Back of Heel over Front of Ankle:** Measure around the foot, following a path between the apex of the Heel to the Dorsum. ![e1](https://www.help.protosthetics.com/hs-fs/hubfs/e1.png?width=542&height=720&name=e1.png)   3\. **Circumference through Apex of Arch:** The path in which the circumference is measured does not have to be normal to the ground, it should fit naturally around the apex of the arch. ![e2](https://www.help.protosthetics.com/hs-fs/hubfs/e2.png?width=542&height=720&name=e2.png) 4\. **Circumference over 1st and 5th Met Heads:** This is also unique to Galileo SMO, so make sure you grab it! This must encapsulate the 1st and 5th Met Heads ![e3](https://www.help.protosthetics.com/hs-fs/hubfs/e3.png?width=542&height=720&name=e3.png)  5\. **Circumference at Proximal Trim Height** ![e4](https://www.help.protosthetics.com/hs-fs/hubfs/e4.png?width=542&height=720&name=e4.png)  6\. **Width at Apex of Malleoli** ![e5](https://www.help.protosthetics.com/hs-fs/hubfs/e5.png?width=542&height=720&name=e5.png)  7\. **Height of Lateral Malleolus** ![e6](https://www.help.protosthetics.com/hs-fs/hubfs/e6.png?width=542&height=720&name=e6.png)   8\. **Height of Medial Malleolus** ![e7](https://www.help.protosthetics.com/hs-fs/hubfs/e7.png?width=542&height=720&name=e7.png)   \*9. **Height of Desired Proximal Trim**\*\* ![e8](https://www.help.protosthetics.com/hs-fs/hubfs/e8.png?width=542&height=720&name=e8.png)  10\. **Width at Met Heads:** Should not be taken as a straight line between the two met heads, rather perpendicular to the longitudinal axis of the foot ![e9](https://www.help.protosthetics.com/hs-fs/hubfs/e9.png?width=542&height=720&name=e9.png)   11\. **Posterior Calcaneus to End of 5th Toe**  ![e10](https://www.help.protosthetics.com/hs-fs/hubfs/e10.png?width=542&height=720&name=e10.png) 12\. **Posterior Calcaneus to 5th Met Head** ![w12](https://www.help.protosthetics.com/hs-fs/hubfs/w12.png?width=542&height=720&name=w12.png)   13\. **Posterior Calcaneus to 1st Met Head** ![e13](https://www.help.protosthetics.com/hs-fs/hubfs/e13.png?width=542&height=720&name=e13.png)   14\. **Posterior Calcaneus to End of 1st Toe** ![e14](https://www.help.protosthetics.com/hs-fs/hubfs/e14.png?width=542&height=720&name=e14.png)   - 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