Brand new in box Birkenstock Boston clogs, in black suede, size 40 Medium/Narrow (equivalent to US women’s 9 or 9N). Birkenstock divides their sizing into “Regular/Wide” and “Medium/Narrow,” and these are Medium/Narrow. Birkenstock’s website has full details on their sizing if you’re unsure if the Medium/Narrow will be the right fit. Unworn, genuine, with tags and box, and super cute! TikTok made these HUGELY popular!