The margin of victory can not be smaller, but it was another gold for the giant talent Maja Åskag.
She started by jumping 6.29 and then she improved a little in each jump until the fourth where the full hit came.
Then she jumped 6.60 meters - 15 centimeters better than the best she had previously done in approved winds.
It was an inch longer than the Indian silver medalist Shaili Singh's best hope.
The bronze went to the Ukrainian Mariia Horielova.
Åskag also won double gold at the U20 European Championships in Tallinn earlier this summer.
The gold is Sweden's third at the U20 WC, except for Åskags earlier, Gabriel Wallmark won the men's triple jump earlier today. Oskar Edlund was first in the finish in the final of the 400 meter hurdles, but was washed later.