I've always had a soft spot for the heft of that final book on my shelf — you can feel the story's weight before you even open it. For 'Harry Potter and the Deathly Hallows', page counts actually depend a lot on which edition you're holding. The most commonly cited figures are roughly 607 pages for the Bloomsbury (UK) hardback/standard edition and about 759 pages for the Scholastic (US) hardcover first printing. Those two numbers pop up everywhere because Bloomsbury and Scholastic used different layouts, fonts, and paper sizes, which dramatically changes the total page count even though the text is the same.
Beyond those headline numbers, there’s a bunch of variation: paperback printings, mass-market editions, and reprints often shift things by a few dozen pages. Illustrated or deluxe editions can either increase page count (larger pages with illustrations) or reduce it if type is larger and art spreads replace text on some pages. Translated editions in other languages will also vary, sometimes significantly, because of language length and typography. If you’ve got a copy in front of you, the easiest way to be precise is to check the copyright page (it usually lists the edition and ISBN) or flip to the publisher’s info online — that’ll give you the exact page number for that specific printing.
Personally, I tend to say: expect roughly 600–760 pages depending on the edition. When I reread my Bloomsbury copy, it felt almost compact and dense in that satisfying end-of-series way; a friend with the Scholastic copy swore hers was a brick you could use for construction. If you tell me which cover or publisher you’ve got, I can give you the exact count for that version — otherwise, pick a number in that range and you’ll be close enough for shelf space and reading time estimates.