Roxanne is a Thomas Gillmer design and was built by C. E. Ryder in Bristol, Rhode Island. built predominantly of fiberglass, with teak wood trim. The deck is fiberglass with a balsa core, while the hull is fiberglass with an Airtex foam core.
The design has a cutter sloop rig, with a boom-mounted, self-tending staysail, a teak bowsprit, a spooned raked stem, a raised transom, a skeg-mounted rudder controlled by a tiller and a fixed swept fin keel. The keel design is a modified long keel, with a cutout for the propeller shaft, creating a fin keel. It displaces 8,500 lb (3,856 kg) and carries 3,400 lb (1,542 kg) of lead ballast.
The boat is fitted with a Universal Atomic 15, 12 hp diesel engine. The fuel tank holds 15 U.S. gallons and the fresh water tank has a capacity of 47 U.S. gallons.
The galley is mounted on the port side at the bottom of the companionway stairs, with a sink and two-burner, alcohol-fired stove. The icebox is mounted to starboard and serves as a navigation table as well. The head is forward, just behind the bow "V"-berth and includes storage space and a hanging locker. It has privacy doors. Additional sleeping accommodation in the main cabin includes a port settee that extends under the head and a starboard settee that opens to a double. The interior wooden trim is all teak.
Ventilation is provided by dorade vents, three cowl vents, a forward hatch and six opening portlights.
Hull number 58 of 70 built