Where is the template from the_post_thumbnail()?

Question

My content.php is used both for my front page than for my single posts. The problem is that it calls the thumbnail with "the_post_thumbnail()" and the thumbnail returns with a particular width and height (<img width="308" height="208"....

I need to change get a different width and height depending if is_single().

Where is the template for the thumbnail or how can I archive this?

Answer 1

Assuming that this is a theme that you can edit-- ie. one of your own creation-- the_post_thumbnail accepts an argument for size.

the_post_thumbnail( $size, $attr );

Just give it the size you want, for example:

the_post_thumbnail('full');