Don't forget, all of our themes are 100% responsive, so they look great on any screen size - from phone to cinema display. By default, Tumblr uses it's own default 'mobile theme' when you're viewing your blog on small devices, but you can turn it off:

On your Edit Theme page, open up the Advanced tab (at the bottom of the left hand column), and then un-tick the Use default mobile theme option to keep your awesome theme style on mobile too!