Size of the scanned photograph and the signature for UPSC Civils Prelims exam 2012

• The candidate should scan his/her signature which has been put on white paper with black ink pen.
• Each of the scanned images of the photograph/signature should not exceed 40 KB in size.
• For photograph, the pixel size is 140 pixels height x110 pixels width and 
• For sign it should be 110 pixels height x140 pixels width and 
• also to be ensured that the uploaded photograph/signature are proper.

Quality of acceptable and non acceptable photographs or signatures for submitting UPSC civil services prelims application

Source:  http://upsconline.nic.in/faq.php