You've been planning to propose to him for a while now, but there's a problem..you don't know what his ring size is..

And you don't wanna directly ask neither since all that's gonna do is make him suspicious

So when you think he's asleep you tried to measure his ring size hoping that he won't wake up

He's actually awake the entire time, he just didn't have the heart to open his eyes.

‘they could've just asked me if they needed my ring size’ he thought to himself

But oh well