The Wyoming
Displacement 10,000 short tons (9,100 metric tons) approx.
Length
450 ft (140 m) overall
350 ft (110 m) on deck
329.5 ft (100.4 m) between perpendiculars
Beam 50.1 ft (15.3 m)
Draught 30.4 ft (9.3 m)
Depth of hold 33 ft (10 m)
Propulsion Sail
Sail plan six-masted schooner: 22 sails: 6 gaff main sails (No. 1 to 5 of equal size, spanker sail of larger size), 6 gaff topsails, 5 staysails, 5 foresails with 39,826.8 sq ft (3,700 m²) sail area
Speed 16 knots (30 km/h; 18 mph)
Complement 13[2] (last voyage), 16[3] (captain, 1st & 2nd mates, engineer, cook, cabin boy, 7 - 10 abs)
Damm big. A 100 gun Naval ship of the line typically displaced about 7,000 tons and ran 175 ft in length.
Probably the military vessels needed the maneuverability. What's quite surprising to me is how long such large wood cargo vessels were built and in use. Clearly this one exceeded what most down the ages considered the practical limit. :^)
The late Lionel Casson wrote about the grain haulers of the Roman Mediterranean, they were huge, and those in the know who wanted to travel great distances by sea booked passage on those. I'd be surprised if the remains of some aren't down there on the seafloor, such as in the straits of Messina.
The USS Constitution was built with a lengthwise truss system to prevent "hogging", and at some unknown point in the past, some flagrant idiot had it all cut out. In one of the recent-years refits, this missing component was rediscovered somehow, restored, and it so stiffened the hull that it's again possible for it to go out under sail. Shame, it never will.