Sharpening animated Gif for Avatar?

[rockslide26]

Does anyone know how to sharpen the quality of an animated GIF? This is supposed to be my Avatar, but It is very... eew when put as my avatar. Hao2sharpen?

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[GenaralSkar]

Make it square-er

[rockslide26]

I can't. It is already a rectangle

[GenaralSkar]

Then make the smaller version not square.