Apparently the new 1.7.2 update to Minecraft introduced this change among others:

Portals to the Nether can now have different shapes

Can anyone elaborate this? What shapes? What part of their construction has changed, and what remains the same?


1 Answer 1


The portal must be rectangular (e.g. 3x3, 4x2, 3x5, but no circles).

It has a maximum internal size of 21x21.

It must be at least 3 tall, and at least 2 wide (not including the frame, with the frame that ends up as 5x4).

If you build multiple portals in front of each other and light them, only the rear most portal will be visible, but all will function. This may be a bug.

  • 1
    You refer to internal sizes (3x2, etc.) but I thought 23x23 was the maximum external size. Can you verify or clarify this?
    – dlras2
    Commented Oct 28, 2013 at 21:45
  • @dlras2 : I was wrong. I assumed the source I was looking at for size also referred to internal size when it actually meant external.
    – Macha
    Commented Oct 30, 2013 at 17:04

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