Okay these are from my size chart.
Mattress size Quilt size
crib 17X52. 36X54
twin 34X75. 54X90
double 54X75. 72 X90
queen 60X80. 90X108
king 76X80. 108X108
As you can see, your quilt size is only a couple of inches over. I have found some fabrics need to be washed and ironed while still damp to help remove the wrinkles.