Windows 7 - Find all files and folders larger than a given size

I want to find all files and folders on my C: drive that are larger than a given size, since I've forgotten half of what I have on there.

Typing "size:>100MB" into the search box in Windows Explorer just returns "No items match your search" for some reason.

I found a program called Agent Ransack (https://www.mythicsoft.com/agentransack/) that does mostly what I want, but it doesn't search folders themselves.

Is there another program that I can use which will show me files AND folders larger than a given size, or get windows search to do what it's supposed to?