Ive got the original in a 2848x2136 resolution so if anyone wants a different sized wallpaper just let me know.
Edit: Ive changed the wallpaper download to its original size of 2848x2136. So now people can resize it to their liking.
For those who dont know how to do this I'll give a very brief overview. Open it up in gimp, right click on the image, highlight 'image', then click on scale image. You may have to do some cropping first.
If the image looks funny try saving it as a .png or .xcf file first before scaling the image.
You can take it from there.