If you want to know the length of your fingers and the size of your palm, you can compare it with several classmates around you. If most people are small, they have some defects.
But then again, if the technology is well mastered, it should not be a problem to be a little thinner. In my personal impression, domestic handball is not particularly popular, and there are even some minorities. It shouldn't be difficult to join a handball team when the number of participants is small.