Blog image

Hi guys,

I need to have my blog Image to be a size that I specify. I can upload and resize the blog image to a size that I want.
Please check the attachments. I have added my settings.

Also I attached the image that I need to show, I need the blog to show thumbnail on the blog list then the original at the blog entry itself.

Currently blog resizes my image. I attached that too.
I am happy with how blog list shows my image. (I attached that too )

Thanks guys.