The baby headed home Tuesday after being delivered by Caesarean section on June 23, a surprising three weeks early.
Her family isn't quite sure what to make of her weight.
Delaney's father, Paul, is 6-foot-2 and her mother, Robin, is 5-foot-7. Nurse Judy Nadolski describes them as "regular-sized."
"We're pretty normal," says Paul, 34.
This isn't the first super-sized baby for the Buzzells.
Their now-4-year-old daughter, Cameron, was born weighing 11 pounds, 8 ounces, and their second child, Alexis, now 2, weighed in at 10 pounds, 8 ounces when she was born.
The entire family joined The Early Show Wednesday from their home in the Milwaukee suburb of Mequon.
"We had two big girls before," Robin told co-anchor Harry Smith. "And so I thought the baby would probably be about the same size. I didn't know she was going to be (as big as she was) until she came out, although I was really, really big when she was inside. But I was pretty surprised at how big she actually was, once she came out.
"She's a chunk. She's pretty heavy. But, that's all we've known. I've never had a normal or average sized baby of 7 or 8 pounds. So, to me she's right how she's supposed to be. But, she is chunky. Two handfuls."
When Cameron was born, Paul said he posted a sign on the door that said "Home of the Whopper." When their second child was born, Paul put up a sign describing her as "Whopper Jr."
With the birth of the "Big Enchilada," the Buzzells say their family is now complete.
"This will be the last one," Paul says.
He joked that "We should make something up" to explain the size of the couple's three children at birth.
The child weighs near double the average newborn. And according to the National Center for Health Statistics, less than 1 percent of babies weigh more than 11 pounds at birth.
Nurse Nadolski said carrying the baby in her arms was like holding a 4- or 5-month-old infant. The diapers and baby T-shirts also were a little on the snug side.
"It was ready for a steak," the nurse said. "It had quite an appetite."