Often times when adding products outside of OTG range, you need to add custom sizing options. This can be achieved by
1. logging into admin portal
2. Go to Size Type and fill in the information required to add a custom sizing option. Note you must double quote each of your sizing options. You will see a "add size success" pop up message once you click ADD. You can use the same email address to add all sizing options with different Size Type names.
Check this video to see how to add custom sizing options for your products.
After a size type has been added, you click on the gear icon on the right side of the size type table to manage the added size type. You could either update it or delete the added size types.
3. For products that already existed in your store, go to your store's dashboard and click "Edit Product". Find the product and click the gear icon on the left side and choose Edit Size and choose your defined sizing in the list of sizing options
4. For products that are not added to the store yet, after store owner set the customized sizing from "Add Size Type", he/she will need to choose the Size Type when adding product from the admin portal.