Leather

Leather is a versatile crafting material.

Cows and mooshrooms
Cows and mooshrooms drop up to 2 pieces of leather upon death.

Horses
Horses drop up to 2 pieces of leather upon death.

Fishing
Leather can be obtained as a "junk" item from fishing.

Trading
Leatherworker villagers will buy 9-12 leather for an emerald.

Issues
Leder Cuero Cuir Bőr Cuoio 革 가죽 Leer Skóra pt-br:Couro Кожа 皮革