Problema con HTML y CSS [Alineación]

El tema es este: quiero hacer que al hacerse mas grande el boton, la TABLA no se haga mas grande, es decir, que quede "atrapada" en su tamaño predeterminado.
No hay mucho mas que explicar, aparte de esto;

Código

/*Essentials */
* {
	font-family: arial, verdana, sans-serif;
	font-size: 102.5%;
}
a, a:visited, a:link, a:hover, a:active {
	text-decoration: none;
	color: #000000;
}
/* Globales */
div#global_container {
	position: absolute;
	top:24%;
	bottom: 0%;
}
td.menug {
	vertical-align: top;
}
button.menu_btn {
	color: #FF0000;
}
/*Menu principal de opciones */
div#menu_container {
	background-color:#FF0000;
	height:100%;
	text-align: top;
	max-height:100%;
}
/* Menu global de acciones */
div#globalFirstScreen {
	background-color:#0000FF;
	position: absolute;
	left: 150%;
	top: 0%;
	height:100%;
	width:500%;
	text-align: top;
	max-height:100%;
}
table.globalFirstScreen {
	background-color:#50FFFF;
	position: absolute;
	top: 0%;
	height:100%;
	text-align: top;
}
table.globalFirstScreen2 {
	background-color:#50FFFF;
	position: absolute;
	height:100%;
	left: 21%;
	top: 0%;
	text-align: top;
}
table.globalFirstScreen3 {
	background-color:#50FFFF;
	position: absolute;
	left: 42%;
	top: 0%;
	height:100%;
	text-align: top;
}
table.globalFirstScreen4 {
	background-color:#50FFFF;
	position: absolute;
	left: 63%;
	top: 0%;
	height:100%;
	text-align: top;
}
/* Menu secundario derecho */
div#globalMenuDerecha {
	background-color:#0000FF;
	position: absolute;
	top: 0%;
	left: 690%;
	height:100%;
	width:100%;
	text-align: top;
}

Código

<html>
	<head>
		<link rel='stylesheet' type='text/css' href='css/index.css' />
		<title>CATH proyect</title>
	</head>
	<body>
	<div id='global_container'>
		<div id='menu_container'>
			<table class='menu_container'>
				<td class='menug'><button class='menu_btn'>Inicio</button></td><tr>
				<td class='menug'><button class='menu_btn'>Comprar</button></td><tr>
				<td class='menug'><button class='menu_btn'>Empresas</button></td><tr>
				<td class='menug'><button class='menu_btn'>Informacion</button></td><tr>
				<td class='menug'><button class='menu_btn'>Estadisticas</button></td><tr>
			</table>
		</div>
		<div id='globalFirstScreen'>
			<table class='globalFirstScreen'>
				<td class='menug'><button class='menu_btn'>Inicio</button></td><tr>
				<td class='menug'><button class='menu_btn'>Comprar</button></td><tr>
				<td class='menug'><button class='menu_btn'>Empresas</button></td><tr>
				<td class='menug'><button class='menu_btn'>Informacion</button></td><tr>
				<td class='menug'><button class='menu_btn'>Estadisticas</button></td><tr>
			</table>
			<table class='globalFirstScreen2'>
				<td class='menug'><button class='menu_btn'>Inicio</button></td><tr>
				<td class='menug'><button class='menu_btn'>Comprar</button></td><tr>
				<td class='menug'><button class='menu_btn'>Empresas</button></td><tr>
				<td class='menug'><button class='menu_btn'>Informacion</button></td><tr>
				<td class='menug'><button class='menu_btn'>Estadisticas</button></td><tr>
			</table>
			<table class='globalFirstScreen3'>
				<td class='menug'><button class='menu_btn'>Inicio</button></td><tr>
				<td class='menug'><button class='menu_btn'>Comprar</button></td><tr>
				<td class='menug'><button class='menu_btn'>Empresas</button></td><tr>
				<td class='menug'><button class='menu_btn'>Informacion</button></td><tr>
				<td class='menug'><button class='menu_btn'>Estadisticas</button></td><tr>
			</table>
			<table class='globalFirstScreen4'>
				<td class='menug'><button class='menu_btn'>Inicio</button></td><tr>
				<td class='menug'><button class='menu_btn'>Comprar</button></td><tr>
				<td class='menug'><button class='menu_btn'>Empresas</button></td><tr>
				<td class='menug'><button class='menu_btn'>Informacion</button></td><tr>
				<td class='menug'><button class='menu_btn'>Estadisticas</button></td><tr>
			</table>
		</div>
		<div id='globalMenuDerecha'>
			<table class='globalMenuDerecha'>
				<td class='menug'><button class='menu_btn'>Inicio</button></td><tr>
				<td class='menug'><button class='menu_btn'>Comprar</button></td><tr>
				<td class='menug'><button class='menu_btn'>Empresas</button></td><tr>
				<td class='menug'><button class='menu_btn'>Informacion</button></td><tr>
				<td class='menug'><button class='menu_btn'>Estadisticas</button></td><tr>
			</table>
		</div>
	</div>
	</body>
</html>