Hello all. I could stand a little help with this question. I am a newbie to quilting, and have never made pillows before. I want to make pillows for my friends for Christmas, and will use a 14 x 14 pillow form. My question is this: do you make the material for the sides exactly 14" or do you add a few inches all around? I know this is an easy one for so many of you, and I really do appreciate your help. Thanks!