What does it mean if your hands are not of the same size?

Nothing really, everyone is disproportionate one way or another, for example the left half of my body tends to be larger than my right half.

If your hand is bigger than your face, it means you have cancer.

It means your feet are not the same size, either.

Check it out.

No one’s body is perfectly symmetrical. I’ve read about people whose feet are different sizes, sometimes to the point that they have to wear different shoe sizes. Most women can tell you that one breast is slightly larger than the other.
One of my legs is slightly longer than the other, but it’s not noticeable to anyone else. All that means is that one of my cuffs gets frayed and the other doesn’t.

Is one further away than the other? It’s called perspective ;-)