The base of the nether portal should be 4 obsidian wide and the sides of the nether portal should be 5 obsidian high. This design will use 14 blocks of obsidian.
Build the obsidian frame.
How to make nether portal. Locate a lava lake above the bedrock between level 1 10 then pour water over it to create obsidian. For creating the nether portal you will need 14 pieces of obsidian flint and steel. The four corners of the frame are not required but portals created by the game always include them resulting in 4 free extra obsidian.
A nether portal is built as a vertical rectangular frame of obsidian 4 5 minimum 23 23 maximum. Make sure that you have all of the materials. In minecraft you need 14 obsidian to build the frame of the nether portal.
Steps to make a nether portal 1. Once you ve built the pickaxe find a water source and fill up at least 10 buckets. The easiest way to make a nether portal in minecraft is to build a diamond pickaxe with 3 diamonds and 2 sticks.