This 4m Airush Starboard Freewing is my favorite size and has a large wind range for wing foiling. It was used last year and sustained some damage from the foil but is fully operational with some professional repairs and holds air. See photos for repair close ups.
Here is what Airush has to say:
This is an all-around wing that’s easy to use.
It’s especially controllable when overpowered and efficient when pumping in light wind due to the generous strut diameter which solidifies the frame’s stiffness. The wing is surprisingly stable when luffed in the neutral position, making it ideal for downwinders and carving.
Optimal for wingfoil beginners to down-the-line wave riders.