Help with fight stick artwork

[Kingdom_Legend]

Hi, I am working on my fight stick art. I am using gimp and i exported the image as a .png. But the image has a white border around it. dose anyone know how to get rid of it? Thank you.

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[Medzy]

Like this?

Spoiler

 

[OldOnyxBones]

Uh... select all, shrink selection X pixels, crop to selection?

The images are broken for me.

Edit: Nevermind, just realized the last guy fixed the image that the OP was trying to embed.