The Samsung Galaxy Tab devices come in three display screen sizes: 7 inches, 8 inches and 10.1 inches. The earlier Tab 2 series includes the Ice cream Sandwich operating system; the Tab 3 series includes the Jelly Bean operating system. The Tab 2 Androids are heavier than the Tab 3 Androids. The Galaxy Tab 3 8.0 and 10.1 series offer a higher external memory to help you store more and stream high-quality videos.

Galaxy Tab 2 7-Inch

The Galaxy Tab 2 7-inch, model GT-P3113, measures 7.6 inches high by 4.8 inches wide by 0.4 inches deep. The physical image display size measures 7 inches, the diagonal between two opposite screen corners. This device weighs 20 oz. The screen resolution is 1,024 by 600 pixels. This smallest tablet of the Galaxy Tab 2 series has 8GB internal memory with added memory capacity up to 32GB via a MicroSD card.

Galaxy Tab 2 10.1-Inch

The Galaxy Tab 2 10.1-inch, model GT-P5113, measures 6.9 inches high by 10.1 inches wide by 0.4 inches deep. This tablet weighs 20.5 oz. The Gorilla Glass display size measures 10.1 inches and the screen resolution is 1,280 by 800 pixels. This tablet has 16GB internal memory. The external memory is up to 32GB with a MicroSD card.

Galaxy Tab 3 7.0

The Galaxy Tab 3 7.0, model SM-T210R, measures 7.4 inches high by 4.4 inches wide by 0.4 inches deep. The external screen size measures 7 inches. This Tab 3 weighs 10.76 oz and the display resolution is 1,024 by 600 pixels. This Tab has 1GB of RAM and external memory capacity of up to 32GB via a MicroSD slot.

Galaxy Tab 3 8.0

The Galaxy Tab 3 8.0, model SM-T310, measures 8.25 inches high by 4.9 inches wide by 0.3 inches deep. The LCD screen measure 8 inches and this model weighs 11.1 oz. The display resolution is 1,280 by 800 pixels. This model comes with 1.5GB of RAM and 16GB internal memory. The Galaxy Tab 3 8.0 has an external memory up to 64GB via a MicroSD card.

Galaxy Tab 3 10.1

The Galaxy Tab 3 10.1, model GT-P5210, measures 6.9 inches high by 9.7 inches wide by .3 inches deep. The display screen measures 10.1 inches. The largest of the Galaxy Tab 3 series weighs 18 oz. The WXGA display resolution is 1,280 by 800 pixels. This tablet has 1GB of RAM and 16GB internal memory. The external memory is up to 64GB with a MicroSD card.