The Magento 2 Size Chart extension helps customers choose the right size for wearable products such as apparel, shoes, accessories, etc. using a size guide. In Magento 2, a size chart refers to a visual representation or guide that provides information about the different sizes available for a particular product. Magento 2 Size Chart by Cynoinfotech allows customers to create and display size guides for wearable products to help them determine the right size before purchasing.