In the grand scheme of worries, deciding which size tablet to get — they all sit within a roughly 3-inch screen range — does not quite rank. But technophiles and technophobes alike struggle ...

Measure Filling The filling should be roughly the size of your tablet, so just put your tablet down and trace around the edges (use a yardstick to ensure that you get straight edges).

A new one from Samsung is beyond big. With a screen measuring 6.3 inches diagonally, the Galaxy Mega is almost as big as a 7-inch tablet computer. The difference: it makes phone calls.

The new Nook Tablet: How does it measure up? Barnes & Noble has rolled out its answer to Amazon.com's Kindle Fire. The Nook Tablet costs a little more and has a few other differences.