The article outlines the steps to add a Size/s within Sync ‘Administration’. Note that you will need to have permission to Administration to access this function.
FOLLOW STEPS BELOW:
1. From within ‘Navigation’ search for ‘Size’
2. Select ‘Sizes’
3. Click on the ‘Add’ Icon i.e. Green +
4. Within the new row, add the size that’s required.
5. Repeat step 3-4 for any additional sizes you need to add OR Click enter to add a new row
NB. For a quick tutorial watch below