Size guide add-on allows you to assign ready-to-use default size chart templates to the product page
You can navigate to Woostify Options and enable this add-on.
Then go to Size guides -> Add new to create a size chart template. You can enable a page builder like Elementor to create a perfect size chart.
The last step is set this size chart as the default so it will apply for all the products
In the product description, a small button “Size guides” will appear so you can click it to get the size chart