Add a new size chart chart specifying name such as, Shirts. You can add table title name, product description with image and other details of your product. However, admin can increase or decrease product rows as well.
After product chart go to the product edit page then select product charts tab. Here, you can see two options for enable or disable size chart. The other option is to select the size chart name as already added.
Front-end view for size charts
At front-end you can see size charts with all details added. For instance, size chart button places beside add to cart button when you click on it a popup appears at your screen which reveals all the product data mentioned.