Studs

I am a complete newby and I don't understand the different weights of different leathers. I am planning on getting into making full English schooling chaps, half chaps and western chaps. Can anyone please explain what different weights are best for? Thanks

I'm looking for some chap making classes. I have absolutely no experience at all, so I am looking for more of a complete construction program, rather than specific skills. Also I would like to lean more towards English schooling chaps and westerns chaps instead of chinks. I live in California but I am willing to travel. Does anyone know of any classes? Thanks!