How do guys figure out engagement right sizes?

I was just curious as to how guys figure out women's ring size without her knowing? Especially if she doesnt wear rings?

Use one of your closest girl friend's to figure it out for them without you knowing

Also Siblings or parents too.

Posted by Echo
Use one of your closest girl friend's to figure it out for them without you knowing

Also Siblings or parents too.

MN makes alot of sense.

Posted by WarAngel1

Posted by Echo
Use one of your closest girl friend's to figure it out for them without you knowing

Also Siblings or parents too.

Someone mentioned using string, it was a good idea.

click to expand

Woah i havent heard about that one