Adding to your sandal collection is the to your classic BIRKENSTOCK sandals is the Big Buckle Arizona. Made from a waterproof EVA upper, these stunning sandals feature notable big buckle fastenings. These flats are perfect to wear all summer long. Available sizes: 3.5,4.5,5,5.5,7,2.5. BIRKENSTOCK Mules / Casual Shoes Arizona Big Buckle EVA Eggshell Available in women's sizes. by BIRKENSTOCK. One of the biggest trends this season is mules, and this beige pair from BIRKENSTOCK is a great choice! The brand has designed the Arizona Big Buckle Eva Eggshell with a synthetic upper. Put your feet at ease with its synthetic insole. You'll have a spring in your step! Available sizes: 3.5,4.5,7,2.5. BIRKENSTOCK Mules / Casual Shoes Arizona Big Buckle EVA Eggshell Available in women's sizes. by BIRKENSTOCK. One of the biggest trends this season is mules, and this beige pair from BIRKENSTOCK is a great choice! The brand has designed the Arizona Big Buckle Eva Eggshell with a synthetic upper. Put your feet at ease with its synthetic insole. You'll have a spring in your step!