5" x 7". 100% recycled matte cardstock. To order more than 19, you must choose "19+" from the quantity drop-down, and then edit the number for the quantity you desire. The Saint Lawrence Seaway (French: la Voie Maritime du Saint-Laurent) is a system of locks, canals and channels in Canada and the United States that permit ocean-going vessels to travel from the Atlantic Ocean to the Great Lakes of North America, as far inland as the western end of Lake Superior. The Seaway is named for the Saint Lawrence River, which flows from Lake Ontario to the Atlantic Ocean. The ship in this design takes its name from one of the seven locks in the Saint Lawrence River portion of the Seaway, including St. Lambert Lock—Saint Lambert, QC, Côte Ste. Catherine Lock—Sainte-Catherine, QC, Beauharnois Locks (two locks)—Melocheville, QC, Snell Lock—Massena, NY, Eisenhower Lock—Massena, NY, and Iroquois Lock—Iroquois, ON. Original artwork by Catherine LaPointe Vollmer.