You kind of have to phrase this question in the context of the weather conditions you are willing to go in. In a light SW
wind (which we rarely see here), you could go across in a
dinghy. In the dreaded "northerly component" that is so often mentioned, if it's above 15 kts and it been blowing for a day or more, I wouldn't take my 36' across. On the other hand, I've gone across on a 51'
Dufour when the
wind had been NE at >25kt for 4 straight days, and although it was no fun at all, there was never any question the
boat was going to make it. So there is no one answer, except possibly that ANY
boat can do it in the right conditions.
A lot depends on your ability and your sail inventory as well. pete