You can easily use the Campaign to manage which product to show the Size Chart.
We have 3 methods to choose the product for the Campaign in Where to Show tab.
As you see in the Image, you can see the Apply for all products and Manual method can be understand easily.
With the Automated method, you can choose the Condition for the product.
- All conditions: If you choose this option, the product which match all of the condition will show the Size Chart for Campaign.
- Any conditions: This option will apply if the product meet 1 of the list condition you set.