changing image size on index page

Hello, I need some help please, I did a search but to no prevail,

I am using the latest version of zen
my website is https://www.gibsonchocolates.com
only addon I have is the menu bar

Here is what I am trying to do, the images on the homepage are to small for me, I was looking to make them bigger, I have firebug ,but I really dont know how to see how to use it when it comes to layout options, so, can someone tell me where I would go to change the image size of the photos, IE: New Products for March, thank you :smile:

Hi There,

These aren't done manually.

Login to your zen cart admin.

Configuration > Images

you may also need to use

Configuration > layout settings