Hermès Sandal Sizing: The Complete Sizing Guide

Choosing the proper size in a Hermès sandal purchase is more important than in many other types of footwear. Because Hermès uses full-weight, firm calfskin, a sandal that is slightly undersized will cannot accommodate a larger foot in the way that a thinner or cheaper hide would. On the other hand, a sandal that is too big will slide, fold and crease unattractively, and deteriorate asymmetrically. The conditioning period that allows Hermès leather to conform to the foot assumes a correct starting size — the leather conforms to your specific foot within its right size.

The following addresses all aspects of Hermès sizing for Hermès sandals: Hermès size equivalents in other systems, the fit details specific to each main style, how to measure your foot correctly, and guidance for half-size ambiguity. It also covers particular circumstances — various foot anatomies and material variations.

How Hermès Sizes Work

Hermès sandals use the European sizing system, which includes both whole and half sizes. This is a numerical system based on foot length in Paris points — each Paris point equals approximately 6.67mm. The Hermès size range for sandals typically spans from approximately EU 34 to EU 42. EU sizes convert to other systems as follows: EU 37 = US Women’s 7 = UK 4; EU 38 = US Women’s 7.5–8 = UK 5; EU 39 = US Women’s 8.5–9 = UK 6; EU 40 = US Women’s 9–9.5 = UK 6.5. These equivalents are not exact and assume a medium width.

One significant detail of Hermès sizing is that it varies slightly between styles. The Oran and Izmir are constructed on different shoe forms, and the same EU size may fit santorini hermes sandals slightly differently in each. A significant number of wearers find that their size in the Izmir versus the Oran differs by one half-size, even in the same European size. This is not a manufacturing inconsistency — it is a function of different shoe architecture.

Oran-Specific Sizing: The Oran Sizing Guide

The Hermès Oran typically matches standard EU sizing for medium-width feet. For a first purchase without the ability to try in a boutique, the wisest option is to begin with your correct EU number based on foot length measurement. If your measurement sits between two Hermès sizes, sizing up by half a size is typically the better choice, because the leather cannot stretch into a larger length but will mold to a minimally larger shoe as the leather softens.

For feet wider than average — especially for feet noticeably broader than standard — the sizing approach changes. The H-cutout upper has a defined width at any given size, and a significantly wide foot may be limited by it. Choosing the next half-size up can provide additional room through the cutout area. The downside is a slightly longer sandal, which can result in a slightly slack slingback strap even when set at maximum tension. Some buyers with wider feet resolve this through minor cobbler work to the strap.

Sizing the Hermès Izmir: How to Size the Izmir

The Izmir’s closed-back design introduces a different fitting situation than the Oran. Because the back is permanent rather than variable, the fit across the heel and back of the foot is wholly a function of the size picked. For standard heel dimensions, the Izmir fits true to size — the leather fits closely around the back without pinching and without slipping. For narrow heels, going down one half-size may provide a more secure fit. For substantial heel bones, sizing up by half a size gives the enclosed back additional room.

The break-in process for the Izmir requires the closed heel conforming to the heel’s specific contours, which takes 5–10 wears in Epsom leather. If the closed heel causes real pain rather than merely stiff and new, it is worth reassessing the size — real pain, rather than the typical tightness of unworn calfskin, could suggest incorrect sizing.

How to Measure Your Foot: The Correct Method

The most reliable way to determine your Hermès size without an in-person try-on is to measure your foot accurately and match to the official Hermès size chart. To measure accurately: stand on a piece of paper with your full weight on the foot, place the paper against a wall with your heel touching the wall, and indicate the furthest point of your longest toe with a marker. Calculate the distance from wall to mark in millimetres — this is your foot length. Check your measurement against the Hermès chart. According to sizing experts at The RealReal, accurate foot measuring is the best indicator of size satisfaction and return rates.