# SizeItUp > SizeItUp (also written Size It Up; https://sizeitup.us) is a free daily size comparison game in the browser, about your sense of scale. Each round draws a familiar teal object at its real size; the player stretches an orange shape until it looks right beside it, then confirms to see the true size, its source and a score out of 100. There are five rounds a day per game, and a new numbered puzzle for every game at midnight in the player's own timezone. The whole site is in English at https://sizeitup.us/ and in Spanish (/es), Brazilian Portuguese (/pt-br), French (/fr), German (/de) and Japanese (/ja), e.g. https://sizeitup.us/es/play and https://sizeitup.us/ja/sizes/earth. The legal pages and support are English only. Every page also has a Markdown copy at its address plus `.md`, e.g. https://sizeitup.us/sizes/blue-whale.md and https://sizeitup.us/es/play.md; the English home page's is https://sizeitup.us/index.md. Each starts with front matter giving the page's title, description, address and language, and each page links to its copy with ``. Requesting a page's normal address with an `Accept: text/markdown` header returns the same copy. SizeItUp is an independent browser game; reach the team at support@sizeitup.us. Anyone can play as a guest, which keeps progress in their own browser. Signing in with Google adds a daily ranked leaderboard, streaks across devices and Insight, a points currency spent on cosmetic titles and board themes. There are no ads and nothing to buy with money. ## Daily games - [Classic](https://sizeitup.us/play): 39 everyday objects, from a dime to the Burj Khalifa: coins, balls, paper, sports fields and landmarks. Sizes come from published standards (ISO), sports governing bodies, the US Mint and official landmark sites. - [Cosmic Scale](https://sizeitup.us/play/cosmic): 39 objects in space and on planets: planets, moons, stars, asteroids, a comet's nucleus, canyons, mountains and spacecraft. Sizes come from NASA fact sheets and JPL, plus SpaceX and national park services for rockets and landforms. - [Prehistoric Giants](https://sizeitup.us/play/prehistoric): 31 dinosaurs, extinct giants and living animals for comparison. Sizes come from museum specimens (Natural History Museum London, Field Museum, American Museum of Natural History, Oxford University Museum of Natural History, Te Papa), zoos (San Diego Zoo, Smithsonian's National Zoo, Louisville Zoo) and peer-reviewed papers. - [Kitchen Table](https://sizeitup.us/play/kitchen-table): 31 foods and kitchen things, from a peppercorn to a kitchen island. Foods are sized from grading rules, reference works and peer-reviewed papers; kitchenware is measured on one named product each (Lodge, KitchenAid, Bialetti, IKEA and others) from the maker's specification. - [Tiny Worlds](https://sizeitup.us/play/tiny-worlds): 32 small things, from a 1-yen coin down to an E. coli bacterium: insects and mites, seeds and sand, and cells and microbes, shown in mm and µm. Sizes come from health agencies (US CDC, EPA), museums, universities and peer-reviewed papers; most are the midpoint of a published range. - [Daily leaderboard](https://sizeitup.us/leaderboard): today's ranked totals for each game, shown as anonymous player codes. ## More ways to play - [Free play](https://sizeitup.us/practice): endless unranked rounds from each game's whole collection. It never deals an object that is the answer in a ranked puzzle someone could still be playing. - [Archive](https://sizeitup.us/archive): replay any past daily puzzle, unranked and unsaved. ## Sizes - [How big is it?](https://sizeitup.us/sizes): the sourced size of all 172 objects, smallest to largest per game. - One page per object, e.g. https://sizeitup.us/sizes/statue-of-liberty: the size in metric and US units, exactly what is measured, its sources, familiar comparisons and a to-scale size comparison with the objects nearest in size. ## How scoring works - Each round is scored on how far the guess is from the true size, as a ratio, so guessing double and guessing half are equally wrong. - Within 6% of the true size scores 100. Twice or half the size scores about 33. Five times off or more scores 0. - Scores are computed on the server. The public puzzle files never contain the answers. - Every revealed answer links to the source of its measurement. ## Accounts and privacy - [Your account](https://sizeitup.us/account): signed-in players can delete their account here (also "Delete account" in the profile menu). It immediately erases their sign-in, every score and leaderboard entry, their Insight and purchases, and the game data in that browser. - [Privacy Policy](https://sizeitup.us/legal/privacy): what is collected and why, and how to ask for access, correction or deletion. ## About - [About SizeItUp](https://sizeitup.us/about): what the game is, how it works and how measurements are sourced. - [Contact](https://sizeitup.us/contact): support@sizeitup.us, including measurement corrections. - [Terms of Service](https://sizeitup.us/legal/terms) ## Optional - [Sitemap](https://sizeitup.us/sitemap): every page, readable; the same list for search engines is https://sizeitup.us/sitemap.xml.