Can anyone help with image resize? (filter)

So according to this code here:

add_filter(
	'hivepress/v1/image_sizes',
	function( $image_sizes ) {
		return HivePress\Helpers\merge_arrays(
			$image_sizes,
			[
				'landscape_small' => [
					'width'  => 400,
					'height' => 225,
				],

				'landscape_large' => [
					'width'  => 800,
					'height' => 450,
				],
			]
		);
	}
);

What should it be as I want the frontpage to have only 1 ROW and to contain 468×60 images (banners)
Should I set width on both to 468 and height to 60?
Then to regenerate thumbnails?