The WooCommerce Conditional Product Fields at Checkout plugin allows you to display additional product fields at checkout! Fields can be dynamically displayed according to logic rules.and all done using a nice visual editor!

Demo
https://codecanyon.net/item/woocommerce-conditional-product-fields-at-checkout/22556253

Download
https://www.filecad.com/qIhQ/Conditional-Product-Fields-at-Checkout-v2.7.rar