|Boat weight||9,370 lb (4,250 kg)|
|Draft||7.18 ft (2.19 m)|
|LOA||36.42 ft (11.10 m)|
|LWL||32.71 ft (9.97 m)|
|Beam||10.80 ft (3.29 m)|
|Engine type||Volvo D1-20 18 hp (13 kW) diesel engine|
|Keel/board type||fin keel with weighted bulb|
|Ballast||3,516 lb (1,595 kg)|
|Rudder(s)||internally-mounted spade-type rudder|
|Rig type||Bermuda rig|
|I foretriangle height||47.74 ft (14.55 m)|
|J foretriangle base||13.85 ft (4.22 m)|
|P mainsail luff||45.24 ft (13.79 m)|
|E mainsail foot||14.50 ft (4.42 m)|
|Sailplan||fractional rigged sloop|
|Mainsail area||327.99 sq ft (30.471 m2)|
|Jib/genoa area||330.60 sq ft (30.714 m2)|
|Gennaker area||1,399 sq ft (130.0 m2)|
|Total sail area||658.59 sq ft (61.185 m2)|
The J/111 is a recreational keelboat, built predominantly of fiberglass. Construction is glass reinforced polyester and a balsa fiberglass vinylester sandwich via vacuum bag molding. It has a fractional sloop rig with a keel-stepped carbon fiber mast with two sets of swept spreaders, an aluminum boom and steel rod rigging. It has a retractable bowsprit, a plumb stem, an open and sightly reverse transom, an internally mounted spade-type rudder controlled by a wheel and a fixed cast iron, fin keel with a weighted lead bulb. It displaces 9,370 lb (4,250 kg) and carries 3,516 lb (1,595 kg) of ballast.
The boat is fitted with a Swedish Volvo D1-20 diesel engine of 18 hp (13 kW) for docking and maneuvering. The fuel tank holds 13 U.S. gallons (49 L; 11 imp gal) and the fresh water tank has a capacity of 26.4 U.S. gallons (100 L; 22.0 imp gal). The holding tank is 11.9 U.S. gallons (45 L; 9.9 imp gal)
The design has sleeping accommodation for six to eight people, with a double "V"-berth in the bow cabin, two straight settee berths in the main cabin around a folding table, two aft quarter berths, plus two optional fold-up sea-berths. The galley is located on the port side at the companionway ladder. The galley is "L"-shaped and is equipped with a two-burner stove and a sink. A navigation station is opposite the galley, on the starboard side. The enclosed head is located just aft of the bow cabin on the port side. Cabin head room is 70 in (180 cm).
The boat is supported by an active class club that organizes racing events, the J/111 Class Association.