First take the fabric snip the edge of the fabric, then rip it the rest of the way. Fold the larger piece in half and iron it.
Use a small dab of hot glue to attach the 1" strip to the pen. Then start wrapping it around the pen diagonally, attach with glue every inch or so. When you get to the top, attach the end with glue and snip off any extra fabric.
To make the flower for the top, cut slits about 1/4-1/2" apart down the raw edge of the folded piece of fabric. Make sure you don’t cut all the way through to the fold. It is better to stay 1/4 inch away from the fold.
To make the fabric flower top, glue the bottom edge of your fabric onto the top of the pen, about 1/4-1/2" down. Now just continue wrapping your cut fabric around the top, securing it with tiny dabs of glue as you go. When you get to the end, glue the edge down securely.
Now it’s time to fluff it up. For maximum fluffiness, pull the pieces of fabric apart two at a time. I think they look best really fluffed.