you measure the sides of the quilt- add about 20" extra to miter your corners-have enough to join the ends-
measure the width of the binding fabric (figuring here about 40") so...if your quilt measures 100" square- you would need 420" of continuous binding.
if your fabric is 40" wide you would need 11 strips (10 1/2)
if you cut your binding strips 2 1/2" wide you would need 27 1/2" of fabric
use the same method with your actual measurements.
