dont listen to this retard, say you do go bigger in size, even a half a size. your season will be ruined. do not take this kids advice. go lower in size heat mild them, then start wearing them like a mofo. After that first month of breaking them in they will feel like the boots are one with your feet. no sloppy movement inside the boot from too much room. any movement your foot makes your boot makes instantly with a good fitting pair of boots, however if you buy them too big say youre going down some steeps, every turn you try to make will become more and more difficult because youre expending more energy to get your skis to turn with extra room in your boots. the tighter the better.
remember ski boots arent made for walking just because they are tight in a shop doesnt mean they are too small when youre on the hill in a skiing stance where the knees ben forward and the toes come back away from the toe box. good luck i hope you find the right pair.
I've had my zebra ones for 2 years now and the foam smashs down alot. like i've grown a full boot size since i bought them but they still fit me good. so expect the foam to smash.