Here's a link to a border calculator:
http://www.quiltersparadiseesc.com/C...Calculator.php
The calculator will help you if you cut your borders WOF. I tend to cut mine lengthwise depending on the print and what I happen to have purchased. If you wanted to do the same you'd need:
2-1/4 yd for 4" border
2-1/2 yd for 5" border
2-3/4 yd for 6" border