Why is my siggy so small?

[Kyptix]

For whatever reason, it says its only 256 x 57 or something like that, but when I made it it was in 500x100 pixels.
I'm using photoshop.
Edit: it's also blurry as hell.. here's what it looks like in photoshop.
https://i.gyazo.com/a74017db19815359f496a116a4877391.png