How do I change logo width?

What is the file that I have to edit to change the width and height of my logo?

thanks

in file

Code:

---

templates/css/style.css

---

Code:

---

#header h1 {
    margin: 0px;
    padding: 0px;
    background: transparent url(../images/logo.jpg) no-repeat;
    text-indent: -9999px;
    float: left;
    display: inline;
}

---