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Text Attributes for WooCommerce
v1.0.3 · by Andrei Zobnin
Allows you to type attribute values in the input field instead of choosing from the drop-down list.
About this plugin
This plugin returns the option to choose a product attribute type, which was removed from WooCommerce 3.3. With this plugin you can use select/text/number/textarea type.
WooCommerce requires at least: 3.6