Women's Birkenstock Siena Vegan Slide Sandals EUR 37 US 6/6.5 Canvas Textile Slides Narrow Eggshell Beige Off-White Flip Flops New without box. Size EUR 37, which, according to Birkenstock size chart, equivalents to US 6-6.5. Narrow width. Light marks from store's size stickers. Real colors may be slightly different from what you see on your screen. Item will come with the seller's personal tag attached to the item's exterior. Thank you for checking out my closet! I'm open to offers! Fast shipping!