White line with logo

Hello,

Can you tell me how to enlarge the white line on whitch the logo is positioned? I know ho to shrink or to enlarge the logo in de index.php and css.files but what i need is to enlarge the width of this line to, say, 100 in stead of 70... See image. I can shrink the logo to 70 but then it will look to small.

Thanx in advance

Send link so we could inspect

Please look at:
www.calculusvastgoed.nl/

Thanx

Because it is a production site we made the logo smaller for the audience...
The goal is a logo like in the first post of this topic

In layout.css:

#logo {
height: 70px;
width: 103px;
float: left;
}

and

#topmenu {
height: 70px;
margin: 0 auto;
}

increase height: 70px; in both places. Then edit index.php of template, find this code:

alter height attribute