Tutorial Sizing issue

I’ve been trying to complete the bracket mount tutorial, but I noticed when the video drags out 15mm, it fits the part fine. When I drag it out, I need 30mm in order to match the view on the tutorial. I can upsize it but I wanted to know if I’m doing something wrong and how to correct it. My zoom is set to 5mm as tutorial requests.

[Example] Imgur: The magic of the Internet
This shows both a 15 and 30mm diameter circle. The video clearly shows 15 but it ends up much larger.

Tutorial sizing

Hey @Duder, is it possible that the tutorial mentions radius, while you are using diameter?

Yeah totally. But in the video, they seemed to drag it out the same, and then it snapped larger. It was odd. TY for the reply.