Last updated: 5 October 2026.
Using the site
You may use SizeGuess for personal play, classroom activities and ordinary sharing of challenge or comparison links. Do not attempt to disrupt the website, abuse the contact form or present yourself as the site operator.
Measurements and game results
Measurements are educational references. Natural objects vary, dinosaur sizes are estimates and named models or structures can change. Always read the selected convention and consult the original source. Do not rely on this game for construction, engineering, navigation, purchasing specifications or other precision decisions.
A score reflects closeness to the game’s selected reference value. It is not a diagnosis, certification or formal assessment of vision, intelligence or scientific ability.
Availability and saved progress
The site is provided without a promise of uninterrupted availability or permanent browser-stored progress. Browser settings, cleared data, changed devices and catalogue revisions may affect access to saved games. Shared challenges use a versioned catalogue.
Site materials
The SizeGuess brand, interface, original code, illustrations and editorial text are the site operator’s materials. Measurements cite independent sources. External source websites retain their own rights and terms. No affiliation or endorsement by those sources is implied.
Contact
Use the contact page for questions about these terms, measurement corrections or a rights concern.