What is the size of yellow sea?

Also referred to in China as Huang Hai and in North and South Korea as the West Sea, the Yellow Sea is 870 kilometres long and 556 kilometres wide.

Where does yellow sea end?

The Yellow Sea is separated from the Sea of Japan by the boundary from the southern end of Haenam Peninsula in Jeollanamdo to Jeju Island and divided into the East China Sea by the boundary from the west end of Jeju Island to the Yangtze River estuary.

It was confusing because of Sea of Japan but I get it now.