How do I change the size and style of the price in product listing?

[oldschoo]

Would someone please help me with the size and style of the Price in the product listing?

 

I would like it to match the New Products.

 

Please see my site. New products can be found on the categories menu at the bottom for the time being.

 

Old School Gifts.net

 

I am not sure what file to edit, or how to change it.

 

Thank you for your help.