Will 0-3month be to big?

I'm ordering my sons going home outfit for the hospital. He will be small, probably 6.5-7 lbs.

*Me and his dad were both around 6.5 lbs and there have been no babies bigger than 8 lbs in the family.

I really want to order the green but size NB is only in white. Would the 0-3month look to baggy and bad for photos and stuff?