same-size.js

jQuery( document ).ready( function( $ ) {
	function resizeCallback() {
		var size = 0;
		$blocs =  $( '.same-size' )
	       	$blocs.css( 'height', 'auto' );
	        $blocs.each( function() {
	            size = $( this ).innerHeight() > size ? $( this ).innerHeight() : size;
	        } );
	        $blocs.css( 'height', size );
	}
	resizeCallback();
	$(window).on( 'resize', function() {
	        resizeCallback();
	} );
} );