Kuuak

After setting up WooCommerce and defining product attributes, you can define the default attributes, as well as there order, to be automatically added to new product.
It will make the creation of new product more efficient and fast as you won’t need 
to add manually the attributes, and remembering the same order for each new product.
Tested with WooCommerce version 3.3.3
<h3>Contribute</h3>
Don’t hesitate to fork this plugin and submit pull requests in the <a href="https://github.com/Kuuak/woo-default-attributes" rel="nofollow ugc">github repo</a>.

Woo Default Attributes

Define default attributes to be automatically added in WooCommerce new product page.

Andrei Zobnin

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

Text Attributes for WooCommerce

Allows you to type attribute values in the input field instead of choosing from the drop-down list.

Woo Default Attributes vs Text Attributes for WooCommerce