Logo Size

add something like
.order-branding .company-logo img { width:364px; height:125px;} in your

woocommerce-delivery-notes\templates\print-order\style.css

You can put in your theme function.php the following code

function example_logo_with() {
	?>
		<style>
			.order-branding .company-logo img {
				width: 200px;
				height: auto;
			}
		</style>
	<?php
}
add_action( 'wcdn_head', 'example_logo_with', 20 );