If you are making a sloper for a doll with a commercial body, chances are it has been designed or symmetry. Fold your sloper pattern in half down the center of the back or front, and check the symmetry of your pattern to make sure you made the necklines, should lines, armholes and darts in the same place on either side of your pattern. If your pattern is for a commercial doll, but it does not match closely on the edges when folded, you may need to start again, or adjust some of your seam lines.
If your doll is custom made, or in a particular pose which puts the body out of alignment, your pattern may not be symmetrical. If the pattern is not symmetrical, mark on the sides of the sloper which side of the pattern is on the left of the doll, and which is on the right.
