I have always had trouble finding shoes that fit. I have a long, narrow foot with a high arch. I also have had plantar facitis.
My podiatrist suggested that I try Mizuno. He said he wore Mizunos and recommended them. He's right! I wear a medium/not a narrow/the narrow Mizuno was too narrow for me. Usually I wear an A width.  I had been wearing Aasics/not anymore!!  The Mizunos have the right amount of width for the ball of my foot/and the shoe heel fits my narrow heel perfectly.  The arch fit is right, too.  Many shoes hurt my arch/not the Mizunos.  I wear these shoes for standing and walking at work and for daily walking exercise.  I am not a runner. Normally, my knees hurt.  I guess I have a bit of arthritis.  My knees and feet feel so much better after I started wearing the Mizunos about 6 or 8 months ago.  I can't say enough good things about the Mizunos!  I will not go back to Aasics, Saucony, or New Balance - all shoes that I used to wear.  I highly recommend Mizunos!!