I spent some time trying to create the coolest looking headphones stand / hanger I could think of and I came up with this! The Iron Tentacle! It prints in 3 parts - No supports required (You can add some under the upper tentacle part just for assurance - The ones in the photos were printed without supports) Put some glue between each part to hold them together.
The printed height will be approx. 28cm but that includes the base, and the headphones will hang a bit lower - So if you have really BIG headphones you might wanna scale up the size like 5%-15% (Will be BIG)
There is also a Single File version if you have a big build plate and want to print it in one piece (will require supports).
A 3mf colored version for Bambu Lab printers is also available.