Pictures in posts resize by itself to a ridiculous size!!

Hi,

I’ve installed the Theme “cosmode” and I’ve decoded it from dutch to english, and i have the biggest problem now is, whenever i post something new with a picture it resize by itself to a really weird size!!
I’ve searched through the theme files to find the auto resize function and i was unable to find it!
can any one help me?

here’s the link of the blog so you can see the problem by itself
https://www.boldbar.com

here’s the original size of the picture
https://www.boldbar.com/wp-content/uploads/2009/11/iphone-mms.jpg

thanks in advance.