Bananas for Scale
Curling Stone

Photo from Wikimedia Commons

Curling Stone

The polished granite disc slid across Olympic ice/Sports

Curling stones are made from two specific types of granite: Ailsa Craig Common Green for the body and Blue Hone for the striking band. Each stone must meet strict weight and dimensional specifications set by the World Curling Federation. The concave running surface reduces friction on the ice.

Measurements

Maximum circumference9.1 tenths m
1.6 hundredthsLeaning Towers of Pisa
1.38Clarinet lengths
3.97Wine glass heights
Height (including handle)1.9 tenths m
4.4 hundredthsTrampoline diameters
153 billionthsCalifornia lengths
1 hundredthsBowling lane lengths
Mass (including handle)20 kg
2.2 tenthsHome safes
200 millionthsLocomotive weights
Running band width6 thousandths m
13.3 millionthsPetronas Tower heights
20 trillionthsLight-seconds
Diameter2.9 tenths m
2.9 thousandthsCity block lengths
8.2 tenthsSnare drum diameters
Cup depth (concavity)3 thousandths m
194 millionthsSubway cars
167 quadrillionthsLight-minutes
545 millionthsParking space lengths
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