Since my top was about 70 inches wide, I took one measurement in the center. I took that measurement to my fabric and put a pin in at the correct length. I then cut my 2 side borders to that length BUT added 1/2 inch extra just in case I needed a little extra. I folded the border in half and put in a pin. I then folded the top in half and put in a pin. I matched the top and bottom (extra 1/2 inch hanging off) and matched the center pins. This allowed me to equally distribute the fabric on both halves and I added more pins to ease in the extra as I sewed. Both sides came out perfectly and I trimmed off my extra 1/2 inch.