Even if you are not an experienced seamstress and do not own a sewing machine, a blind hem stitch is easy to complete. All that is required is a basic sewing kit, something most everyone keeps around the house. It is a useful stitch to learn, since it will allow you to shorten skirts, re-size sheets and pillowcases, turn jeans into clam diggers or just resize pieces of clothing for hand-me-downs.
Fold over the edge of the fabric or garment to where you want the new hem to be. Pin along the edge with straight pins to hold it in place.
Choose a thread that closely matches or compliments the piece of fabric you are hemming and thread your needle. Make a knot at the end of the thread.
Use a side seam of the garment or fabric as a starting point. Insert the needle into the fabric by moving it under the existing top edge seam and poking it through this fabric from underneath.
Carefully insert the needle through only a very small part of the backside of the garment or fabric and pull the thread through these holes.
Move ½ inch from where your thread is in the fabric, and use your needle to pierce and pick up a very small amount of the existing hem and a small amount of the backside of the garment or fabric. Pull the thread through these holes and make sure that it is secure, but do not tighten the stitch or your fabric will pull.
Repeat step 5 all along the hem to create a completed row of stitches. Tie a knot at the end of your thread and cut away the excess using scissors.
Turn over the fabric or garment and examine your stitches from the front to ensure that they are neat, even, and nearly invisible.