Different featured image for single posts

So, basically what I am trying to do is the following:

For every post I want to upload 2 different sized images for featured images.
Next I’d like WP to show 1 image when on the home-page and the other one shown in a single post.

So something like this in ‘content.php’:

<?php if ( is_home() ) : ?>
		<?php the_post_thumbnail(); ?> // use thumb_100x100.jpg
	<?php else : ?>
		<?php the_post_thumbnail(); ?> // use thumb_200x200.jpg
<?php endif; //is_home() ?>

How would I set something like this up?

Thanks in advance!!