True Scale
A blue reference object and an orange object stand side by side. Resize the orange one until the sizes match real life, then lock in. Five rounds, up to 100 points each. Within 5% of the real size gives the full 100 points, and a guess twice too big or half too small gives 0. Play True Scale.
Number Dial
Answer one question with a number. After each guess you see higher or lower and a heat clue: hot (within about 25%), warm (within 2 times), cold (within 10 times) or freezing. You get three guesses and your closest one is scored out of 100. Play Number Dial.
Rank Rush
Sort five cards by the rule of the day: height, length, weight, population, area or size. You get one check. Each card in the right spot is worth 20 points. Play Rank Rush.
Survival
Pick the bigger of two things before the 10-second timer ends. Each mistake costs a life and you have three. The pairs get closer in size as your streak grows. Play Survival.
Daily reset and streaks
Daily puzzles change at midnight in your own time zone. Play at least one daily game each day to keep your day streak going. Your stats live only in your browser, so they do not move between devices.
Sizes we use
Buildings use official heights to the top, including spires or antennas when the name says so. Animals use a typical adult. Long things such as whales, planes and ships are measured by length. Planets and balls are measured by diameter.