Don't ask me on text .

However, for file sizes. Judging from the file extension as well as the file size I am sure it is a PNG-24, which is the bulkiest web based file type I know of[even beats 100 quality jpeg last I checked].

JPEG- Likely the best overall format for the final version baring a few exceptions. These exceptions are if it has animation/transparancy/fading-like-effects and if you need to go re-edit it the lossy factor can hurt you.

GIF- This is the animation format. I can't really think of another competitive animation format that is widely supported.

PNG- There are two kinds. the png-8 and the png-24. png-24 is the best for transprancies and certian effects(though the effects are by a small margin). png-8 is very similar to the gif format except it is smaller and doesn't support animation.


Basically the rule of thumb is-

1)Does it have transparancy? If yes use png(either 8 or 24 depending on size restraints). If not ask:
2)Does it have animation? If yes use gif. If not ask:
3)If I save as PNG-24 will it be too large? If yes use jpeg. If not use png.

Just remember to always have a non-lossy save of your sig for editing later(best bet in gimp is to save as a xcf?(the default gimp filetype)).

There you go a quick run down on the three really common types I see.


Anyways as for this latest one.... the render feels kinda clashy to me. Perhaps try blending it?