I used 17" square pillow cases so my measurements are based off of that. If you have different size pillows check out my basic pillow case tutorial for info about how to get the measurements for different sizes and add 11 inches to whatever you need.
For a 17" pillow you'll need 28" of fabric (by the width probably 44" or 60").
For a 17" pillow case you'll need fabric cut to 17x38 (pillow case), 9-11x38 (bow), 6x6 (bow tie). My red pillow case I used the 11x38 inch bow and the pink one was a 9x 38 inch bow.