Tna shoulder bag relief!?

I'm getting a tna bag and I was wondering what colour I should grasp?
any suggestions??
should I get the big bags or small

ONLY COMMENT IF YOU GOT A TNA BAG;; THANKS:)

Answers: 
I hold a black TNA bag, with the multicoloured logos, and I recommend like peas in a pod one (:
Black goes with most of my outfits, and it really give off a good look
p.s. love TNA too , aha.