How do I deal with the "WP_Customize_Cropped_Image_Control" callback?

I wish to make a emblem supervisor within the Customizer, however how do I set totally different picture sizes with the WP_Customize_Cropped_Image_Control class?

Instance from Make WordPress Core:

$wp_customize->add_control( new WP_Customize_Cropped_Image_Control( $wp_customize, 'cropped_image', array(
    'part'     => 'background_image',
    'label'       => __( 'Croppable Picture' ),
    'flex_width'  => true, // Permit any width, making the required worth really useful. False by default.
    'flex_height' => false, // Require the ensuing picture to be precisely as tall as the peak attribute (default).
    'width'       => 1920,
    'peak'      => 1080,
) ) );