Sis 36, which equates to a size 5.5-6 in US sizing. New in box retail for $115 Birkenstock Franca Graceful Midnight Blue sandals offer a sophisticated take on the classic comfort slide. These sandals feature slim, stylish crisscross straps in a shimmering metallic navy finish, complemented by color-coordinated buckles. Built on the legendary anatomically shaped cork-latex footbed, they provide exceptional support and a custom-like fit that improves with wear. The Birko-Flor upper is durable and easy to clean, while the suede-lined footbed ensures breathable comfort for all-day use. Made in Germany with a lightweight EVA sole for flexible cushioning.