I read the best way to truly know a pair of shoes are going to fit without any problems is to do this. If you are mostly righthanded always try the shoe on your left foot. And if you are lefthanded you try the shoe on your right foot.
For me it works every time. Before I knew about this I spent so much money on a couple of pairs of shoes and my feet were yelling with every step. Now I only wear shoes for comfort.
There is a great web site that sells new vintage style shoes. www.AmeriMark.Com
The best thing about this web site is they carry wide sizes. I bought shoes from them three times. With no problems. The only thing is the orders take six to eight weeks to arrive in the mail. Still worth every penny to have cute comfortable shoes.