Fire HD 10 is ten inches, Fire HD 8 is eight inches, and Fire 7 is seven inches. Generations and release years. Tablets also have a generation in the name. The generation refer to the release year. For example, all tablets released in 2019 are 9 the generation tablets. (Don't confuse the tablet size with the generation.
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Amazon Kindle Fire Review - Bible Money Matters May 06, 2019 Kindle Paperwhite Review (2018): Our Favorite E-Reader
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Sep 17, 2012 Kindle Fire HDX 7-inch review: Third time's the charm Oct 01, 2013 The Best Kindle to Buy (and Which to Avoid) for 2020 | WIRED The Kindle Kids Edition is basically a 10th-generation Kindle (the first on this list), dressed up in a cute case and with a year's subscription to FreeTime Unlimited, which lets parents monitor