How big waves needed to flag out wing?

[FoilBenny]

So how big waves do you need to flag out the wing completely?

I had my fourth session today and tried to catch some knee- to waist high waves with my Axis HPS 1050(also tried my BSC 890). I held my wing over head so I could pull in my back hand to get a little help staying on foil, but I wasn't able to flag out the wing by the front handle. Being a beginner I'm not very good at pumping yet, so that could be the problem, but I wonder how small waves you guys are able to surf with no power in the wing.

[Hdip]

I'd imagine it entirely has to do with wind speed. If you are surfing dead downwind on a big wave you might have no wind speed to flag out the wing. If you're on a tiny wave, but can stay on foil and are going crosswind you can flag out the wing easier.