Is Eu Size 39 a Us 8.5 or 9? the Truth Behind European Sizing Inconsistencies
By Chloe Bennett
European shoe sizing originated in mid-19th-century France. The system uses the point de Paris, or Paris point, which equals exactly two-thirds of a centimeter, or 6.67 millimeters. When an artisan constructs a shoe on an EU size 39 last, the total interior mold length is 39 multiplied by 6.67 millimeters, producing an internal cavity of roughly 26.0 centimeters.
American sizing follows an ancient English cordwainer standard based on the barleycorn, defined as one-third of an inch, or 8.46 millimeters. A half-size step in the United States represents roughly 4.23 millimeters. Because European full sizes scale in steps of 6.67 millimeters while American half sizes jump by 4.23 millimeters, the two systems are out of phase. A single Paris point falls between American size intervals.
This mathematical gap creates real friction at EU 39. To match a US Women's 8.5, a foot must measure roughly 9.75 inches (24.8 cm). A US Women's 9 accommodates a foot of roughly 10.0 inches (25.4 cm). Because an EU 39 shoe accommodates a physiological foot length between 24.6 and 25.1 cm, brands are forced to make an arbitrary judgment call. Some round down to US 8.5. Others round up to US 9.
Chloe Bennett explores the intersection of pop culture, streaming entertainment, digital trends, and contemporary lifestyle. Her weekly commentary reaches thousands of culture enthusiasts.
