Though you may not realize it sandals come in a great variety of shapes, sizes, and colors as well as many styles from casual to formal. Some are made just for use at the beach, lake or pool while others, such as those made by Teva may be more suitable for hiking. Regardless of what you are using them for they need to fit right to protect your feet.
Support is the first thing you want to be sure you have in a sandal. For many people this is the main reason that their feet hurt, improper arch support. Your arch is the feature of your foot that assists you with posture and makes you walk more efficiently. Many sandals have built in arch supports while others such as those made from cork will mold to the shape of your foot eventually.
The sole of the sandal should be a little bigger than your foot, I know this may sound like a no brainer but it is easy to get a sandal that will allow your toes to push over the front or off the sides. You want a sandal that has enough room for your foot to conform to it properly. The sandal you choose needs to not only be comfortable but also should be protective of your foot.
The sole of the sandal you choose should be fairly thick as that is the only thing protecting your feet from anything that you may walk on and they also need to absorb the blow of the footsteps. You wouldn’t choose a really thin sole on a regular shoe so this should be no different.
We are speaking of strapped sandals here, not slide on flip flops so the straps should hold the sandals on your feet securely. Try to find sandals that have adjustable straps instead of elastic as the elastic tends to wear out fast and then you will have to replace it to be able to continue wearing the shoes.