What are the most efficient sprite sizes when dealing with Unity?

Like individual tile map sizes for one object or parts.

Have you noticed any difference between all kinds, power of 2 even VS non pow2 sizes.
32x32 vs 32x64
64x64 vs 32x32 vs 64x17 vs 64x128 etc,etc

I am trying to see if someone tested what is the most effecient for sprite art tiling of character maps or even bodypart maps,etc.

64x128 is still in power of 2 same way as 32x32 is. Some graphics cards in the past didn’t have the ability to even render non-power-of-2 textures. But i think that’s starting to be in the very distant past now, and i don’t know what Unity does if it discovers the GPU doesn’t have the capability. It might even scale it automatically.

wow interesting, I’ll definately keep it in mind.

For some type of compressions it needs to be power of 2 so I would go for them.