SortStack #90 — 2026-09-07

By size · Order from shortest to longest.

1. A roasted coffee bean 8.5 mm

   A coffee 'bean' is actually the seed of a cherry-like fruit that grows on shrubs near the equator.

2. A ten-pin bowling pin 38 cm

   Pins are coated in tough plastic and weigh just enough to scatter dramatically yet stand back up reliably.

3. A blue whale 28 m

   The largest animal ever known, its heart alone is the size of a small car and beats just a few times a minute.

4. The Great Pyramid of Giza 139 m

   It was the tallest human-made structure on Earth for nearly 3,800 years until medieval cathedrals surpassed it.

5. Mount Olympus, Greece 2.9 km

   Mythical home of the Greek gods, its peak was not officially climbed by humans until 1913.

6. The River Danube (length) 2.9K km

   It flows through more countries than any other river in the world, passing four national capitals on its way.

← All puzzles · Play today’s SortStack