WP Desk Flexible Product Fields PRO WooCommerce 

Create a product wizard to sell engravings, gift wrapping, gift messages, business cards, stamps, and optionally charge for it (fixed or percentage).

The client could customize a product before adding it to the cart, f.e. adding text to print.

You can assign field groups to all products or selected products, categories, and tags.

You can decide which field will be optional and which needs to be filled by the client.

The plugin lets you add product custom fields below or above the Add to Cart button.

You can set an additional fee (fixed or regular price percentage) for each product option (add-on).

Adding, editing, and removing product custom fields is easy with the plugin.