Your hands will be the better judge of the quality and material of shoes you wish to buy. The inner sole should be soft and without any rough internal seams.
Always purchase shoes after trying them on and walking a few inches. A floor with carpet will make the shoe feel comfortable. Therefore, walk off the carpet to have the original feel of the shoe. When buying casual shoes online or formal shoes online, you should try them on after receiving and make sure they fit. After that check the quality.
One of the basic methods to inspect a shoe is by squeezing the toe and heel part. When let go, there should not be any deformations. Furthermore, the heel must be rigid. If it is soft, it will sag quickly. Same rule applies if you want to be buy women shoes online or buy kids shoes online.