Timber quality sets the practical length of an eighteenth-century warship

What was the longest feasible length for an eighteenth-century warship?

Roughly sixty to sixty-five metres, although timber quality and shipwright skill mattered more than a single fixed limit.

Using first-rate ships such as Princesse Royale as a reference, the practical upper length for a large eighteenth-century warship is estimated at roughly sixty to sixty-five metres. This is not a universal physical boundary. Timber quality and the skill of the shipwrights could matter more than a neat dimensional cutoff.