Originally Posted by Flying_V_Goddess
On her site she says 4" all around for the backing, but it doesn't say anything about the batting.
It's possible she doesn't mention the batting size because she uses batting from a roll on her LA machine for most of the quilts she works on. Many long-armers do this. Some also will take your batting; it's always best to check with them personally first. Some charge for the cost of the batting they already have, some figure it into the cost of the quilting total.
On your own machine you'll want both the batting and the backing to be at least 4" larger than the top ON ALL SIDES. Your quilting WILL shift these layers, you'll need all that extra
Just a heads up: I once quilted madly all week to finish a bedsized quilt for a shoe on Friday, too cheap, too late to get it to a LA quilter. I spent that 'savings' by spending the next 6 weeks at the chiropractor's to repair the damage I did to my back and shoulder! I'll never quilt a large quilt at home again on my machine!!!
Jan in VA