I was told no refund but I believe that would be if I used them. The cool way that they determined my size at Nationals is they had me try the hard shell on with my sock on, no liner!! You should only have about 3/8 of slide back and forth with the binding unbuckled or lightly buckled. This would be for the thin liner. My big toe just touches the front when buckled and ready to ski. I wear a size 9 1/2 to 10 shoe and I have a Size 8 hard shell with a large liner. I used a size 10 Vapor binding.
One tip to just getting started with hard shells is buckle them loose, or about the tightness as your rubber binding.
It's crazy but don't be alarmed if you miss your first deep water start