5ft 9 and which size speedy?

Hmmmm... i'm 1.74 cm, size 38-40 and the size 30 looks great on me and its what I have.
The 35 would also look good because i'm a big girl but I didn't tried it at the store....and do not regret it.

The best think is really going to the store and trying both sizes on!!! But I would say that the 35 is your best fit!!