[1][2][3][4] The design was built by Seidelmann Yachts in Berlin, New Jersey, United States, starting in 1977, but it is now out of production.
It has a masthead sloop rig, a raked stem, a reverse transom, an internally mounted spade-type rudder controlled by a tiller and a fixed fin keel or optional shoal draft keel.
[1][2][4] The boat is normally fitted with a small 4 to 10 hp (3 to 7 kW) outboard motor for docking and maneuvering.
[6] In a 2010 review Steve Henkel wrote, "best features: The S25's wide beam gives good space down below (though not as much as her comp[etitor]s).
With its relatively narrow waterline and soft bilges, the boat is tender in heavy air unless there is plenty of 'rail meat' on board.