It can be difficult to work out what size quilt you want to make, how much fabric you need for backing and binding. Here’s a simple chart. I think that it is a bit heavy on the yardage but, as the saying goes, it’s better to have to much then to not have enough and can’t find it. So true!!
Quilt Size Backing Binding
Twin 63 x 87 5 1/4 yards 3/4 yard
Double 78 x 78 5 1/4 yards 3/4 yard
Queen 84 x 92 7 1/2 yards 7/8 yard
King 92 x 100 8 yards 1 yard
Keep in mind these are general rules of thumb. For more exact measurements you can get help from your quilt shop.