Typically, baguette gemstones are cut into a shape that looks similar to a French baguette, a long, narrow loaf. They come in all different sizes and shapes, but the ones that are slightly wider and longer are the most common. They were introduced to the world in the early 20th century as a new modern cut that was the most popular during the Art Deco era with its distinctive geometric shape that was typical for that period.
Because fewer cuts are required, baguette gemstone rings are typically less expensive than other cuts. They'll probably cost less per carat than, say, a emerald cut.