Open a crafting table
Place the required armor material in the correct pattern
Craft a helmet with 5 material in a helmet shape
Craft chestplate with 8 material in a chestplate shape
Craft leggings with 7 material in a leggings shape
Craft boots with 4 material in a boots shape
Use the material type you want, such as leather, iron, gold, diamond, netherite, or chainmail
For chainmail armor, use crafting only if available in your version; otherwise obtain it through other methods
For netherite armor, first craft diamond armor, then upgrade it with a smithing table and netherite ingot