Danskos are sized according to European (EU) whole size standards.

Fitting Dansko closed-back clogs: Fit may be slightly snug when stepping in. Toes should not touch the front of the clog. Heel should move up and down freely as you walk. A variety of closed-back styles, offering such design features as buckles and elastic are added to styles as a design feature to accommodate both high and low insteps.

Fitting Dansko open-back and sandal styles:

Open-back and sandal styles support the full length of the foot. For some wearers, the heel of the foot will meet the back end of the shoe exactly; for others, the heel may be slightly forward of the back of the shoe. Adjustability is carefully considered in the design of the open-back and sandal uppers, taking the form of buckles, elasticized panels, and convertible heel straps.