Help Lollipop Wiki

Um.. yeah. I am the admin of the Lollipop Chainsaw Wikia and is currently doing a makeover for the Wikia. I am currently having difficulty creating a large enough image for my Wikia that at the same time has to be under the 150 kilobyte limit. I wanted to see if there are any tips to how I can make the image any larger yet have low enough kilobytes to not surpass the limit. Is there a program I could use to do this? WhitePinoy (talk) 05:02, July 30, 2013 (UTC)