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I agree with johanaparker and think the 10" is probably the best overall size, but that's not entirely without a caveat or two. The 10" is better for most things, but I don't really like reading in bed with it as much as a smaller tablet. The size, which is generally a good thing, becomes a drawback when I have to hold it for a long period while reading. It isn't as if it weighs a ton, but it becomes noticeable for me after an hour or so. I actually tend to use my son's Nook for reading in bed.