I m using the professional plan of StoreHippo. Can I have Size chart in my store?

In the professional plan of StoreHippo, you can use the static page for displaying Size charts in your store. The static page named "Size chart" is provided by default in all stores. You can edit the size chart page as per your requirements and provide its link on the storefront. Follow the below steps:

1. Go to Site > Pages section in StoreHippo Admin Panel.
2. Find the default page Size Charts and click to edit it.
3. Make changes to the Static Page as per your requirements and save it.
4. Now to display the page on the storefront, go to Site > Navigations sections in StoreHippo Admin Panel.  
5. Add the navigation to the header to display the page on the header of the website.

For more information, refer the following links:
https://help.storehippo.com/topic/pages 

https://help.storehippo.com/topic/navigation