I teach a lot of beginner adults to ski. Their rental boots are often too large.
Too-big boots make learning to ski very difficult. The boots tell the skis what to do, and the feet tell the boots what to do. A good fit makes this work.
You tell the feet what to do, and the instructor tells you what you're supposed to be telling the feet.
If any part of this chain of command breaks down, it's hard to make those skis work. It often breaks down at the foot-telling-boot part.
For the feet to tell the boots what to do, the feet need to make contact with the boot everywhere.
That means the foot needs to contact the walls of the boot along the top, the left & right sides, the wall in front of the toes, up the back of the heel, all around the ankle and all around the lower leg.
The boots should be snug, but not so tight that they cut off circulation. There should be no air in there.
One more time, there shouldn't be any space between any surface of your foot and the plastic walls inside the boot.
To get this to happen you may need a boot one to two sizes smaller than your street shoe size. Really. If you wear a 10, you may need an 8.
I know the rental shops try to get people into boots that fit, but they still often walk out to me with boots too big.
I think I know why. It has to do with getting the boots on their feet.
So here's the tip:
If the boots fit, they need to be very hard to get on. It should be difficult to force your foot down into the boot, past the ankle area.
You may have to get a second person to wedge the plastic open so you can get that foot down in there.
If you can get the boots on real easy all by yourself, then they are probably two sizes too big.
Edited by LiquidFeet - 2/9/14 at 3:49pm