Emilia Grabarczyk was only 8.6 inches (22cm) long and weighed 8 ounces (229 grams) when she was born at a hospital in the western German city of Witten nine months ago.
Her tiny foot was only 1.2 inches (3cm) long.
Doctors have described her as the "little fighter" and her survival as a "medical sensation" while German media said she was the lightest premature baby ever born in the world.
The early birth was followed by a period of uncertainty. Emilia was born so early that it led to subsequent complications.
Yet luckily for the girl, there are no signs of serious disability.
Her birth at the Maria Hospital came after doctors decided with her parents Lukas, 34, and Sabine, 30, to deliver the baby by Caesarean section at the 26th week of pregnancy.
The record for the smallest baby was said to be held by Rumaisa Rahman, who was born in the Loyola University Medical Centre in the US city of Chicago in 2004 when her mum was only 25 weeks pregnant.