Slave Ships and the Middle Passage – Encyclopedia Virginia
Hesketh, which sailed out of Liverpool and delivered slaves to Saint Kitts in 1761, to the 566-ton Parr, another Liverpool ship that sailed in the 1790s. Ships comparable in size to the Hesketh were designed to carry as few as six pleasure passengers; refitted as a slaver, the Hesketh transported a crew plus thirty Africans. The Parr, on the other hand, carried a crew of 100 and a cargo of as many as 700 slaves. Most ships—nicknamed Guineamen, after the Gulf of Guinea on the west coast of Africa—were sized somewhere in between, growing in tonnage over time as the Atlantic trade itself...
Source: encyclopediavirginia.org