QuickZip Fitted Sheet – Includes 1 Fitted Sheet Base & 2 Zip-On Sheets – Easy to Change, Fold & Wash King Sheet – Soft Sateen 400 TC Cotton Fitted Sheets – 17.5” Deep Pockets King Size Sheets – White Shake the sheet. You should now have a long edge of the fitted fabric on one side of your arm and a short side on the other. Grabbing the short side fold or corner with your free hand, give the whole sheet a firm shake to help straighten it out. How to Fold A Fitted Sheet . Here’s our “How to Fold A Fitted Sheet” video, which has been very popular with many readers! It’s amazing how something like folding a fitted sheet can drive so many people crazy! .