Boston Wire Buckle - Sandcastle
Orthofeet Sizing Chart
Women's Shoe Size Conversion
| US & Canada | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inches | 8.7 | 8.8 | 9 | 9.2 | 9.3 | 9.5 | 9.7 | 9.8 | 10 | 10.2 | 10.3 | 10.5 | 10.7 | 10.8 | 11 |
| Centimeters | 23.1 | 23.6 | 24 | 24.4 | 24.8 | 25.3 | 25.7 | 26.1 | 26.5 | 26.9 | 27.4 | 27.8 | 28.2 | 28.6 | 29.1 |
Women's Shoe Width Chart
| Narrow | Medium | Wide | X-Wide | X-X-Wide |
|---|---|---|---|---|
| A | B | D | 2E | 4E |
Most Orthofeet footwear is available in Medium, Wide and Extra-Wide widths.
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Boston Wire Buckle - Sandcastle
A closed-toe classic grounded in Birkenstock’s contoured cork-latex footbed, offering structure, adjustability, and all-day wearability. This edition features the exclusive Wire Buckle—a slightly larger, streamlined update to the signature hardware that brings a modern edge to a timeless silhouette.
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Fit: Birkenstock footwear is listed in European sizes. To find yours, use the formula below or reference your U.S. shoe size in our conversion chart.
Men’s: U.S. size + 33 = EU size
Women's: U.S. size + 31 = EU size - Material: Classic leather upper, with suede footbed, flexible EVA sole, and one strap with an adjustable metal pin buckle.
- Care: Spot clean only with warm water. Do not bleach. Lay flat to dry. Do not dry clean. Do not iron.
- UFS2601-NDL
Inside the Comfort System
Orthotic Insole
Advanced cushioning and support technology designed to improve comfort and provide a more stable walking experience. Learn More
Arch Booster
Customizable support designed to provide extra comfort exactly where you need it most. Learn More
Fitting Spacers
Removable inserts help customize shoe fit and improve overall comfort for everyday wear. Learn More