This works like a charm to prevent WordPress from adding lots and lots of extra thumbnails. I'd give it 5 stars, but it creates annoying extra admin menus that are not necessary.

I tried many plugins to disable image sizes and there were always some left. Not with this one. It is the best plugin I have tried

Hi, I use the Divi theme. Each media file uploaded generates about 14 different images including the original. That's a lot of space and inode usage. This plugin allows you to choose the sizes you want generated on upload. Often, I just have 2 .... one a 150x150px image for media gallery thumbnail and the original. That means I'm not generating 12 extra images that aren't used. It also allows you to regenerate images ... only those you require ... which is insanely useful ... you can get rid of tonnes of existing images that you are not using. It is a great plugin ... five stars ... try it Regards Mark

thank you so much. you saved me. my site was making 21thumbnails and slowen down my site speed. something that you didnt mention is after choosing setting you have to press regenerate to start deleting old thumbs and generate the ones needed or maybe I missed that part. thanks alot again.

Over the years, WordPress and our themes/plugins has gather 21 different types of thumbnails, so the size was increasing at an alarming speed. By disabling all thumbnails, all 6000 thumbnails are gone for good and after a bit of manual tweaking, all media are functioning as usual. Long live this plugin!

Plug in works and it is must in all of my sites