Read customer reviews of the WordPress Lead Time plugin by Barn2.
Rated 4.78 out of 5 stars based on 9 customer reviews.
Was looking for a plug-in that worked a little like something I saw on a site powered by Shopify and after searching I came across this little gem. It was easy to configure and it gives you the option to either set lead times globally or individually. I set mine globally then tweaked a few individually and as my site progresses I can see myself setting more individually. All in all a great little plugin that’s easy to configure and comes with a good price point.