blog post featured on homepage image blurry and stretched

What's the photo dimension for the images for the blog posts featured on the homepage. In the actual post the image is not stretched or blurry.
Also, the text that is above the blog posts that say "Show Your Latest Posts Here," how do I delete this?

 

Hello,
Please provide your website URL.
Thanks & Regards
Pramod

 

http://buffas.com/subdirectory/

 

Hello,

The image size should be ( 354 x 284 ) pixcels.

And to remove the text ,
Paste the code given below in Custom CSS section
(Appearance -> Theme Options -> Styling Options -> Custom CSS) of your dashboard.

Code:

.feature_blog_content h2 {
display: none;
}

Let me know for further doubts and queries.

Thanks & Regards,
Swapnil Gupta,
InkThemes.com