Blog Picture Help

Ok nothing to do with Abi, but from time to time I like to click on the next blog button and go through different blogs. Some blogs I have gone through have nice big pictures and I was wondering how you do it. We recently got a canon ESL Rebel T3i. Even with me clicking on large photos they are still small. So please comment me if you have a blog that has large pictures and how you do it. Thank you Marsha