background H1 not longer then text?

How can I stop the black backgroundbox to not repeat after the text.
I do not want it to be fixed to a certain length.
In the blog I would like to type my subject and have the text boxed.
Currently it is going 100% de width of the page.

Ok currently I have this in my css for de <H1 >

font:1.9em "Arial", Helvetica, sans-serif;
				color:#FFFFFF;
				margin:5;
				padding:0 20 0px;
				background-color:#000000;

I tried to replace the color with a black image about 24×24. But it either repeats over the whole width and with ‘no repeat” just displays the one image.

I am probably overlooking something, kindly explain me how it is fixed.
With an image maybe?

Here you can see the problem on one of the pages I am testing it on.
H1 header backgroundcolor too long