Size Duel deck
Which is bigger? Every item has one measured dimension: length, height, height above sea level or mass, and duels only compare the same one. Practice rounds never change your daily streak.
Ten duels across the whole deck, easy to hard.
Practise one category
Animals
- Bee hummingbirdlength
- Bee hummingbirdmass
- Blue whalelength
- Blue whalemass
- Capybaralength
- Capybaramass
- Emperor penguinheight
- Giraffeheight
- Giraffemass
- Gorilla (male)height
- Great white sharklength
- Hippopotamusmass
- Human red blood celllength
- Humpback whalelength
- Komodo dragonlength
- Moose (male)mass
- Orca (male)length
- Platypuslength
- Polar bear (male)length
- Polar bear (male)mass
- Saltwater crocodile (male)length
- Sperm whale (male)length
Space
Buildings and bridges
- Akashi Kaikyō Bridgelength
- Arc de Triompheheight
- Atomiumheight
- Berlin TV Towerheight
- Burj Khalifaheight
- CN Towerheight
- Cologne Cathedralheight
- Colosseumheight
- Eiffel Towerheight
- Elizabeth Tower (Big Ben)height
- Golden Gate Bridge towerheight
- Great Pyramid of Gizaheight
- Leaning Tower of Pisaheight
- London Eyeheight
- Øresund Bridgelength
- Ostankino Towerheight
- Petronas Towersheight
- St. Peter’s Basilicaheight
- Statue of Libertyheight
- Taipei 101height
- Tokyo Skytreeheight
- Tower Bridgelength
- Washington Monumentheight
- Willis Towerheight
Mountains
- Aconcaguaheight above sea level
- Ben Nevisheight above sea level
- Denaliheight above sea level
- K2height above sea level
- Matterhornheight above sea level
- Mauna Keaheight above sea level
- Mont Blancheight above sea level
- Mount Elbrusheight above sea level
- Mount Everestheight above sea level
- Mount Fujiheight above sea level
- Mount Kenyaheight above sea level
- Mount Kilimanjaroheight above sea level
- Mount Olympusheight above sea level
- Mount Rainierheight above sea level
- Mount Teideheight above sea level
- Mount Vesuviusheight above sea level
- Table Mountainheight above sea level
- Zugspitzeheight above sea level