One pillow case --- I used a standard size pillow case but any size will do.
Your favorite stuffing --- I prefer to use polyester fiberfill because of it's squishy-ness.
Sewing supplies --- sewing machine, thread, pins, scissors, pinking shears.
Pencil or maker and something round (plate, bowl or cardboard circle cut out).
Iron your pillow case and turn it inside out. Then trim off the hemmed edge of the pillow case.
Use something round (a plate, bowl or cardboard circle cut out works well) to draw the cloud 'humps'. Or, if your comfortable doing so, draw the cloud freehand.
Cut off excess fabric. (if you used a sharpie like I did cut just below your drawn line) Pin all around and get ready to stitch.
Because your using a pillow case, you'll have two sides that are already seamed. That means half of the the work is already done for you -- yay! Start stitching around the cut and pinned edge. Don't forget to back stitch in the beginning and end. Go slowly around the curves and in the corners stop with your needle down, lift your presser foot, pivot, lower your presser foot and continue sewing. Stop before you get to the end, leaving a space big enough for your hand to fit for turning and stuffing, and back stitch.
Trim the seam allowance with pinking shears then turn the pillow case right side out. Stuff your pillow and then close the opening by hand-stitching or machine stitching.
Hope you enjoy your new cloud pillow -- make a whole sky-full! I'd love to see the ones you make. Please leave me a link in the comments. And, if anything is unclear in my instructions, please let me know.