Pencils are great for marking and drawing general guidelines. They will will smoothly mark your design.
Pencil is approximately 5 7/8 in. x 3/8 in. and comes in a handy, clear plastic, reusable tube. This product lives up to its name, its easy gliding motion.
But the points do wear down quickly. Keep a pencil sharpener handy when you're marking. Always test chalk on scrap fabric before beginning your project.