Make the height of all elements with the selected class becomes automatic depends on the maximum height.

Auto height element

jQuery( function( $ ) {
    if( $( window ).width() > 750 ) {
        autoHeight( '.__your_class' );
    } else {
        $( '.__your_class' ).height( 'auto' );
    }

    $( window ).resize( function() {
        if( $( window ).width() > 750 ) {
            autoHeight( '.__your_class' );
        } else {
            $( '.__your_class' ).height( 'auto' );
        }
    } );

    /**
     * Make the height of all elements with the selected class becomes automatic depends on the maximum height. 
     * @param  {[string]} resource [selected class]
     * @return {[void]}            [automatic change height]
     */
    function autoHeight( resource ) {
        $( resource ).height( 'auto' );
        var maxHeight = Math.max.apply( null, $( resource ).map( function() {
            return $( this ).height();
        } ).get() );

        $( resource ).height( maxHeight );
    }
} );