Designed for Casual. Our shoes use US sizing and run small. To find your fit, measure your foot from heel to toe in cm and check it against the US size in our size chart. If youre between sizes or plan on wearing with socks, consider sizing up. The upper may feel snug at first but will naturally stretch over time as part of the break-in process. Slip into total ease. With a sculpted look and The Clincher contoured fit technology, the SwayDay mule is an easy choice for days at home or on the go. | lululemonMen's SwayDay MuleColor BlackSize 11.5