An online friend of mine made me a Sailor Chibi Moon siggie but it's too big to use on here and I really want to use because it matches my avatar that my online friend also made.
Here's the link to the original siggie that my online friend made for me:
https://i.imgur.com/A1h8699.jpg

I've tried to resize it so that I can use it on a few times but it won't work so I'm hoping that someone can resize it for me so that I can use it on here.

I'm afraid the size of it is quite impossible to resize to our standard (450x150). As your image is more of a square than a rectangle, if you try to resize it, you will only be able to fit part of the original image or it'll end up being really small. If you like, you can request a new one where someone can try to recreate the original in a size that will fit our standards? ^^ (Using the same image & text, etc)