I have several NB, so I knew that I needed a 13 even though I am a size 12 in almost everything else. NB run very true to size on width. A D might be narrower than some are used to, but are perfect for my feet.  I have worn these backpacking through Thailand. Great mix of trainer, trail, casual. I do wish I had slightly more toe box, but this is what makes them good for climbing. It's a compromise. Toe guard came unglued on one side, but I am pretty hard with them. Super glue forever!