A Utah mom has been shopping for larger diapers after giving birth to a 14-pound baby boy.

Sara Brandon gave birth to her son, Joel Brandon Jr., or “J.J.,” by cesarean section last May and was shocked by his size, especially since her last ultrasound estimated his weight as closer to 11 pounds.

“When they stuck him on the scale he was 14 pounds even,” Brandon told ABCNews.com. “The doctor said it was the biggest baby he had ever delivered.”

The delivery was a bit different from Brandon’s previous birth experience with twin girls. Each girl weighed 4 pounds, and together they still weighed 6 pounds less than J.J.

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