NB usable on 1 breast?

[anxiousgirl]

Hello, I'm new to NB and have done some reading about it.
I was wondering if it is possible to use it on one boob, since once of my boobs is smaller than the other.. it really makes me insecure

 

[midbackn2013]

Of course it's possible plenty of girls have evened out their boobs with NB

 

[Keylee]

I do it all the time after a full session of noogling, I focus on my left one for a little bit longer ;D
I just take the right cup off, bend the hose and wrapped a hair tie around it so no air can go pass except the left