The biggest concern for shoppers while doing online shopping is the right size. Though the size chart is universal, the manufacturing of each brand differs, making it a challenge to shop for footwear and clothes online. One of the most crucial aspects of buying footwear online is determining the size. Therefore, it is essential to measure your foot and follow the size guide for every online purchase. There are five types of measurements you usually get to see online that is size in centimetres, UK number, US number, EU number and size in inches.