akherati

this plugin enable search field in woocommerce attributes when you add OR edit products. 
If you encounter a very large number of attributes when inserting your product attributes, this plugin is for you so you no longer have to spend time finding one attribute out of hundreds of attributes.
this plugin will add good feature to woocommerce so you must install and active woocommerce plugin before that.

fast select Attributes for WooCommerce

You can search and fast select woocommerce attributes of too many attributes in add product page or edit product page.

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.

fast select Attributes for WooCommerce vs Woo Default Attributes