you need to know how large the quilt is you want to border in order to do the math & figure out how much fabric you need for your borders- a quilt that is 54"x72" is going to need alot less fabric than one that is 72" x 90"...we can not decide for you how much border fabric you need without at least knowing how big the starting item is- to be bordered...if you want to purchase fabrics before making the quilt & it's a good sale buy 2 or 3 yards of what you like- then what is left over is 'stash' fabric. if you buy 3 yards you can cut continuous borders-instead of having to piece the long sides- binding will probably be at least a 1/2 yd- maybe 2/3 or more---again depends on how big the quilt is you are wanting to bind- since the binding has to go all the way around it-- if you buy a yard you will have plenty- with again a bit for your stash...at least you wont be short.