display of product thumbnails Frontend_custom.css

This is the page in question:- : www.heaven27.com.au/index.php/features/p...ith-knit-tudor-rose-

I am showing 5 thumbnails for the product. I have edited the frontend_custom.css to this:
}
img.hikashop_child_image{
margin : 1px;
width:112px;
}

If I go wider than 1px margin or 112px for the thumbnail I get 2 rows. The main picture however is 675px wide. (5 x 112 = 560px and 10px for all margins??)
How do I align the row of thumbnails with the picture above so both line up left and right?
I guess it is in the frontend_custom.css ?

Thanks for your help.

Thomas

Great, works fine.

Just for the records, syntax has to be:
width: 680px !important;

Thanks again for your help,

Thomas