Questioning myself about backing material
Morning to everyone. I don't recall a time where I have questioned myself on how much backing I need for a quilt. I'm quilting it with my longarm. This quilt is my friends quilt who has just recently gotten the quilting bug. So she has me questioning myself on the amount you need for backing. Now mostly I like at least 6" all the way around for overage. Her quilt is 66wx77L. So I got out my quilting calculator and it tells me that at 43" wide material I would need at least 5Yards and that's making the seam right down the length of the backing....(which I hate ugg) and when she brought the quilt/backing/batting to me and checked and mentioned that there wouldn't be enough backing as she only had 2Meters + 5 inches...
So am I wrong and she is right that she has enough.....I told her that you need room to make the backing square and take off the selvages and have at least 4" for overage (I prefer 6")...
Thanks for any advice...