sloper [n]: a basic pattern that follows the natural lines and represents the basic dimensions of a figure, from which all styles are based on. Also called basic pattern, block pattern, or foundation pattern.
That's the new term I learned today while searching for a free pattern to use as a base for the yo-yo vest I am working on for my littlest granddaughter. I started the vest awhile ago, but wasn't sure if the shape of it was going to work. I found a pattern (sloper) online. Then I drew a rough sketch on a brown paper bag I had cut open. I tweaked the pattern until it looked right. Next I lay out the yo-yo's on top of the pattern and started stitching them together.
I think it will go well with the selvage skirt also in the works.
Sure hope it fits!