Multiple options for products on woocommerce stopped working

Avg Bid (USD)
Project Budget (USD)
$10 - $30

Project Description:
I have been working in woocommerce recently and have had some issues when updating a field for one of the products. Before I changed the name of the option box there was a drop down menu where clients could select what shoe size they wanted.

I cannot figure out why it is not working anymore but I need this product - to have multiple options for shoe sizes. It was working fine about a month ago but now is not.

Would be helpful if you have woocommerce experience previously.

Skills required:
CSS, HTML, Wordpress
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