• Hi, B would be a medium width. A, AA are narrow widths.
    Answered on 10/20/2016 3:44:52 PM by Julie upstate from New York
  • I wear medium size and B in Brooks shoes fits perfect. B stands for regular or normal width. I hope this helps!! I really recommend this tennis shoes. I am so happy I don't get any more pain in my knees because of this great shoes!!
    Answered on 10/20/2016 4:36:16 PM by Karlita from Sandy Utah
  • B is a medium width. According to our fit team this item is running true to size.
    Answered on 10/21/2016 8:11:58 AM by Product Specialist Greg from Sierra Trading Post
  • B refers to medium in women's sizes. Brooks run true to size, so I would suggest ordering the 10 B (or M).
    Answered on 10/21/2016 9:48:22 AM by Ernsmith from St Paul MN