Mini tablets are smaller and lighter than original larger full-sized tablets. The first successful ones were introduced by Samsung (Galaxy Tab 7-inch), Barnes and Noble (the Nook Tablet), Blackberry Playbook, and Amazon (the Kindle Fire) in 2011, and by Google (the Nexus 7) in 2012. Most of them work like a regular tablet, though some of them may not have all the features and functions found in bigger tablet computers. The typical mini tablet is generally 6 or 7 inches (15 - 17.6 cm) diagonal. Mini tablets, such as the Toshiba Regza 6-inch tablet and the Sylvania 7-inch, are easier to transport in pockets and purses than the larger 9+ inch types, such as the iPad.