For publishing a display ad in Deccan Herald you can visit the following site: https://deccanherald.releasemyad.com/display-ad/main-newspaper
Please note that the minimum size of any display ad has to be 4 cm (width) x 4 cm (height) from second page to back page and 12 cm (width) x 20 cm (height) - for front page. Please let us know if you wish to place in any preferred page or in the classified page.
Because the ad size you have mentioned is for Classified ad.