Left: 41 narrow, Right: 40 regular (I'm normally a 39 or 40) Which looks better to you? I find 40R more comfy but the woman in the store said i should go
BIRKENSTOCK Mayari Birkibuc Mocha Sandals Womens EU 40 US 9-9.5 Regular / Wide | eBay
Amazon.com | Birkenstock Original Boston ESD Leather Narrow Width, Black L9 M7 40,0 | Mules & Clogs