Our glove sizing is unisex. They have a fairly standard initial fit, but our gloves are made with all-stretchable materials so they break-in and conform to your hand like no other ski glove. We use natural cowhide leather, 4-Way stretch soft-shell material and insulation that packs down. So, it's actually hard to go wrong with sizing our gloves.
How does sizing of X Models compare to the original models?
The X Models and newer models run slightly bigger than the first generation original models and they have wider wrists for a less tight fit and easier on-off.
If you are between sizes, I'd use three criteria to decide:
1) If you have longer fingers go with the larger size. If you have short or normal fingers go with the smaller size.
2) If you like a bit roomier glove that will pack out less and be a bit warmer (more space to breathe) go with the larger size. If you like a glove that will break in more for optimum dexterity go with the smaller size.
3) For optimum long term fit new gloves should be slightly snug. If you think they may be too big, they are too big.
Note: Free the Powder Gloves are made with all-stretchable materials that break in more than most gloves.