on the top of this fourm is a sitcky thread that explaines how big your allowed to have it , i pulled this from it , hope it helps.
9. Signatures, Photos and Images: Every member enjoys personalizing their posts with a unique signature. In order to speed forum loading time and avoid excessive scrolling for all members, we have instituted these guidelines for signatures.
Total signature size can't be larger than 30 Kb (30,000 bytes). This also includes any smilies added to a signature.
The max total height of a signature with NO TEXT is 150 pixels high.
The max total height of a signature with one line of standard sized text (size 2) is 134 pixels high.
The max total width of a signature is 640 pixels wide.
If you decide not to use an image, you may have up to 4 lines of standard size text, single-spaced.
In general, if you have an image banner, no other text, ticker, smilie, etc. will be allowed. Exceptions may occur if your image is small enough for the signature not to exceed 150 pixels in height with the text included.
You may include a discreet link to another site in your signature. You may not advertise your site in the main body of your post.
Member signatures are subject to review and deletion by the moderating team without advance warning.
All signatures are subject to the same rules and regulations as any post, and are subject to the same disciplinary actions and editing by moderators if it is deemed necessary, up to and including banning.
Any embedded photos or images posted at TCS may not be larger than 640 pixels wide. Photos or images larger than 640 pixels wide may be deleted by a Moderator and disciplinary action may take place at the discretion of the Moderator. This includes photos and images that are hosted anywhere on the Internet. Photos that are attached to a thread are restricted by the attachment manager settings already in place and cannot be over-riden.