I think your width is more important than your height. I am 5"2 and have a 226 in black and love it. When I was pregnant and immediately postpartum it was definitely too small for day.
But now I'm (relatively) slim again,it rocks!! I'm a jumbo flap girl too,so it's always a bit of getting used to 226 again.
So if you're tall and slim,keep your 226 but if you're slightly bigger get the 227.
Anyway when you get the bag you'll know instantly if it's for you. I wished I had a 227 when I was pregnant,and I would still like one for those "bigger bag" days,but I can't be bothered to track one down LOL.