Birkenstock London size 37

I’m selling these NEW Birkenstock Bostons for my mom. We went to buy a pair for me (size 38). She decided she wanted them as well, bought them and wore them out of the store w/o the box. After the first walk out of the store, she decided the shoes were not for her. I on the other hand LOVE mine. I’m a nurse and keep them at the hospital. They’re great for long surgery hours and being on my feet for 12 hour shifts.