are you quilting it or sending it out? you can make it work-
if sending it out to a long-armer simply add some muslin (leaders) basted on all the way around to give her a little more to work with---talk to her about it- she will advise you- if you are quilting it yourself baste very very well- and as long as you don't quilt it too heavily you will probably have plenty- the more quilting there is the more (draw up) of the fabric there is- so if the quilting is not very intricate it won't draw up alot. i long-arm and have had many with that much (or less) i just baste muslin on to give me something to pin to when loading- and allow room- it does take extra care & can cost a little more due to more work- but it is a doable situation.