This is a Narrow width. 
The BIRKENSTOCK Boston clog is a veritable classic that can easily be worn all year round. With its additional foam layer, the soft footbed offers extra comfort and pampers feet – all day long. The nature-inspired design is evident from the soft suede upper, which hugs the foot like second skin.  1023542
 
Original BIRKENSTOCK soft footbed; anatomically shaped
Upper: suede
Footbed lining: suede
Sole: EVA
Details: one strap with an individually adjustable metal pin buckle; soft footbed
Made in Germany