Leather: 3 armor, 0 armor toughness, 0 knockback resistance
Copper: 4 armor, 0 armor toughness, 0 knockback resistance
Iron: 5 armor, 0 armor toughness, 0 knockback resistance
Gold: 7 armor, 0 armor toughness, 0 knockback resistance
Diamond: 11 armor, 2 armor toughness, 0 knockback resistance
Netherite: 19 armor, 3 armor toughness, 1 knockback resistance

All values can be seen and edited in data/cmds/function/tick.mcfunction