In regular shoes I wear a wide 8.5.  I ordered this Iron colored soft footbed in women's regular 39 from the Birkenstock website... I always order it from them directly and in the same size I've always worn.  Love the color!  That's something new for me.  They are nice looking and look exactly as pictured (like a charcoal gray).  And length-wise they are perfect.  But I rated it just okay because these are the most narrow Birkenstock sandal I have ever had.  I'm very disappointed!  For the first time I am buckling them in the first hole.

I had one other soft footbed in another color I bought maybe 10 yrs ago (they recently fell apart-- the cork began to crack) and I remember them feeling different but eventually they got really comfortable.  I just don't remember them being this narrow.  I doubled checked the size and it says "regular" on the box but nothing on the shoe.  I compared it to my other pair of slip on Birks (not soft footbed) and they are noticeably more narrow.  I'm not sure what to think right now.  I like Birks because they come wide but these are quite snug... not uncomfortably so, but not much room for swelling.

I am gonna give it a few months and see if they break in and get better.  They also feel pretty darn hard right now.  I use them primarily in the house because the hardwood floors are hard on my feet... not feeling much better than the floor.  The upside is that they LOOK less clumpy and like they're a more perfect fit.  Let's hope the comfort catches up to the looks.  Had them a week... if they get better or worse, will update.

July 2018 update: after wearing these for a couple of weeks they got a lot more comfortable so I changed my 3 rating to a 4.  Still a bit snug but a very good shoe!