3.5 million square kilometers

Photo from Wikimedia Commons
South China Sea
The contested marginal sea of the western Pacific/Oceans & Seas
The South China Sea is a marginal sea of the Pacific Ocean covering about 3.5 million square kilometers, bounded by China, Taiwan, the Philippines, Borneo, Indonesia, the Malay Peninsula, and Vietnam. It has an average depth of 1,060 m and a maximum depth of 5,016 m in the Manila Trench. Roughly one-third of the world's shipping passes through it, carrying over $3 trillion in trade annually. The sea contains numerous disputed islands, reefs, and atolls, including the Spratly and Paracel Islands.
Measurements
Surface area3.5 trillion m2
5.03Texases
3.9 millionAirport runways
1 millionCentral Parks
North-south extent3.5 million m
1.9 millionDining table lengths
41,396Olympic straights
140 millionPostage stamp widths
Taiwan Strait to Borneo
East-west extent1 million m
7.6 quadrillionthsMagellanic Cloud widths
33,333Blue whale lengths
Vietnam to Philippines
Average depth1,060 m
55,643Penny diameters
116RV lengths
4,609Wine glass heights
Mean depth
Maximum depth5,016 m
274Railroad car lengths
279 billionthsLight-minutes
Manila Trench
Volume3.7 quadrillion m3
569 quintillionHuman eyeballs
617 trillionCement mixer drums
163Great Lakes combined
3.7 million cubic kilometers