Overall, dance shoes should fit comfortably snug. They should feel like a glove enveloping your feet. You may find that your correct shoe size, for dancing, is smaller than your regular shoe size. That could be especially true if you are in between sizes or have narrow feet. If you have standard width foot or don't plan to wear our shoes for dancing, then start by choosing your regular street shoe size. If needed, you can make a return for exchange or refund.
For open-toe designs, your toes should be close to the front of the shoe but not hanging over the edge. Generally speaking, your toes will be closer to the edge for dancing shoes than in your regular street shoes to avoid catching the floor during dance moves.
With wear, the leather will stretch, molding to the shape of your foot. The shoes will stretch across the widest part of your foot as you break them in, but they will not stretch in the length.
Axis Tango shoes are based on Italian/European sizing.