Did you update Woocommerce recently, and your product variations stopped working? Theres a plugin for that. Check out our latest plugin to fix the Woocommerce variations limit.With our plugin, you can increase the number of variations from the default 10. This should fix those peky drop down menus. View on WordPress.org

Our plugin will allow you to increase that variations limit. Basically if you update Woocommerce and your variations stopped working, install this plugin and set the variations limit to 40. They should come back to working like magic.