I sew the binding ends together on the diagonal this way.
Overlap the ends.....
Measure the top one from the point where they meet the measurement of the width of the unfolded binding.
(if binding is cut 2.5" then the overlap is 2.5")
Put thumbs inside the fold with the right side facing away from you.
Lay the leaft on the horizontal
Bring the right around with right side facing you
Line up the ends - like an L
Sew from upper left to the lower right.
Lay down on quilt to make sure it lays even
Then cut off the ends of the binding strips on the diagonal.