Wanting to try the smallest vessels I could, even in this already very small scale, I've painted up a 1/1200 pinnace, with crew, from Langton. It's about the size of my first finger nail, when well trimmed. The set includes six pinnaces, three rowed and three sailed (the latter do not contain crew).
These little vessels were the largest class of ships boats, used to move people and supplies between ship and shore.
At first I tried painting hair on the crew's heads, just little dabs of paint, but it made it too hard to notice them. They stand out better while bald. Clearly the scurvy is raging in their ship, let's hope they are pulling for a shore rich with citrus fruits.
Here are a couple comparison shots, with a 14 gun cutter and a 40 gun frigate, also Langton models.