<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Стилизация Select</title>
<style type="text/css">
body{
padding:100px;
margin:0;
background:#CCC;
color:#000;
}
.newListSelected{
width:360px;
margin:0 auto;
}
.selectBlock{
width: 50px;
}
.selectBlock1{
width: 100px;
}
.selectedTxt{
width:320px;
height:35px;
padding:0 30px 0 10px;
overflow:hidden;
background:url(select.png);
color:#000;
font-size:24px;
line-height:32px;
zoom:1;
position:relative;
z-index:1;
}
.newList{
list-style:none;
padding:0;
margin:0 0 0 4px;
width:352px;
position:absolute;
z-index:500;
top:35px;
}
.newList li{padding:0;margin:0;}
.newList li a{
display:block;
background:#FFF;
opacity:0.85;
filter:alpha(opacity=85);
font-size:18px;
padding:0 6px;
line-height:normal;
outline:none;
height:30px;
padding:6px 0 0 6px;
overflow:hidden;
}
.newList li a:link,.newList li a:visited,.newList li a:hover{color:#000;text-decoration:none;}
.newList li a.hiLite,.newList li a.newListHover{opacity:0.95;filter:alpha(opacity=95);}
</style>
</head>
<body>
<form action="#">
<select class="selectBlock">
<option>Казань</option>
<option>Волгоград</option>
<option>Астрахань</option>
<option>Ростов</option>
<option>Армавир</option>
</select>
</form>
<form action="#">
<select class="selectBlock1">
<option>Казань</option>
<option>Волгоград</option>
<option>Астрахань</option>
<option>Ростов</option>
<option>Армавир</option>
</select>
</form>
</body>
</html>
а если надо с помощью jquery то
$(function(){
$(".selectBlock").css({width: "50px"});
$(".selectBlock1").css({width: "100px"});
})
