In order to get your Shopify orders syncing correctly, here are the steps you need to take:
1 - Click Your Name on the upper right corner of the screen > Select "Account Settings"
2 - Scroll down to Bulk Product Update
3 - Download Product CSV file to get SKUs to copy to Shopify
4 - Copy SKUs for each size to the appropriate Shopify product
You can add SKUs on Shopify either in individual products like this:
Or you can edit en masse by using the bulk edit function. You first select the products to edit:
and then on the next screen edit the SKUs for a bunch of products at once:
Troubleshooting problems with ReCharge / Subscription products!
You must request a SKU update from Recharge in order for new SKUs to be used with your subscriptions. Simply email email@example.com to make that request, and their support team will handle it for you!