Sizes Not Showing

You need to create Variable product within Product data.

I thought that’s what I did, but I’m not seeing the ‘Used for variations’ checkbox

Then it may not be variable. See https://docs.woothemes.com/document/variable-product/

Ok, I had the mix up of having the product listed as a simple product, but now its saying ‘This product is currently out of stock and unavailable.’

Follow all instructions in that doc. It won’t be setup correctly.

Ok, I followed all the steps and I see the Size dropdown field, but it only says ‘Choose an option’ but no sizes appear. See here: https://dev.theshoppersexpress.com/wp-content/uploads/2016/04/Screen-Shot-2016-04-20-at-11.02.07-AM.png I have it set up the same way on another site and it seems to be working fine. The only difference is the Woocommerce version, I’m updated to the latest, but the other site has an older version, but the size attribute is working on the other site.

The variations need prices and to be in stock.