It IS possible to shorten curtains without getting out the sewing machine! This is an incredibly handy hack for anyone who wants to change the length of their curtains.
When hanging drapes or curtains, you want to hang them really high and wide to create the illusion of height and space in your room.
For this hemming method, I may shock you with this first step: I'm hanging my drapes on the installed curtain rod before I even hem them!
Measure and cut.
Take some wide iron-on hem tape, insert it in between your double-folded hem, and use your hot iron to make the iron-on adhesive stick to your hem.