Product Addons Plugin for WooCommerce
You can let your customers customize their orders by adding dropdown menu, input boxes, file uploads and checkboxes to the checkout process.
WooCommerce product Addons by WooThemes
Let Your Customers Personalize Their Product Options
With WooCommerce Product Addons, your customers can customize their product orders by adding additional input fields to the checkout process. Customers can include a gift message, make a donation, laser engraving or any other optional services you may provide that will make their product unique to them!
You can have WooCommerce Product Addons assign addons on a per product basis or even globally, all from then edit product pages. The product addons can be named, reordered and even assign an additional price for the addon.
Once a product addon is set up, they appear on products just above the Add to Cart form.
Variable Subscription Pricing
If you are using the WooCommerce Subscriptions plugin, you can add optional addon pricing for your recurring subscriptions.