Your image complies with the size rules
Only one image per signature. Images in signatures must also be no larger than 500 pixels wide X 90 pixels high. If you have more than one image you will be requested to remove one. If this is not done in a timely manner the staff has the right to modify your signature to abide by these rules.
The image you want to use is 500 x 89 pixels
The rule you quoted states in full
Links in your signature must be unobtrusive and can not use formatting so that attention is brought to them.
That is primarily so signature links won't end up "in your face" like this with formatting that makes the link bigger than it should be.Bleeping Computer Rules
Unobtrusive would beBleeping Computer Rules
From what I can see the image is fine.
Thank you for asking about it first.
Edited by Queen-Evie, 17 April 2015 - 12:52 AM.