Blogspot Template Motocross How Do You Make Blogspot Template Bigger? Using HTML?

How do you make blogspot template bigger? Using HTML? - blogspot template motocross

I want to change my blog template for my blog can be greater, because if they are published, are really small. My blog is pagetwentythrree.blogspot.com. I want the articles to the same size as thesartorialist.blogspot.com.
I read in another question that I need to change that with HTML template, but I do not know exactly what to do, please someone could tell me how?
Thank you!