Step A
Click on Enable SmartSize
Step B
Click on the toggle to embed SmartSize (make sure you embed it in your live store theme. It wont work with your draft themes)
Click on Save
Step C
Go back to SmartSize
Click on 'New size chart'
Step D
Select the template you want to start from. In this case, we are selecting 'polos' for men.
Step E
Give your size chart a name (this will only be visible to you)
Select the products and / or collections where you would like to link your size chart
Step F
Enter the values. Important, double click in a cell to start entering your values. You can also copy and paste your data from Excel or Google Sheets.
Step G
Set the status of the size chart to: 'Active'
Make sure that you save your changes
Visit your store and open the product where you linked the size chart
Is it all looking good?
No -- If you are not able to see your size chart check this page: Troubleshooting
Yes -- In this case, you can now head to Settings and,change the look and feel of your size chart button.