These shoes should not stretch that much in the width of the shoe. The leather uppers will stretch some but form to the shape of you foot over time. The Anasazi LV uses synthetic material for the upper material.
Generally, when getting climbing shoes in smaller sizes, that is compared to you everyday shoes regarding length. Most customers have found that Five Ten climbing shoes have fit pretty true to other climbing shoes, like La Sportiva's.
I would suggest getting your usual climbing shoe size. Also, please note that this style is designed for a narrower foot type. If you have a wider foot I would reccomend considering Five Ten's Blackwing.