how big is a micro penis

A micropenis is medically defined as a stretched penile length (SPL) of less than about 3 inches (7.5 to 9.3 centimeters) in adults. This means that an adult penis measuring under this length when fully stretched is considered a micropenis. For infants and children, the cutoff lengths are much smaller, with measurement thresholds increasing with age. For example, in a term newborn, a micropenis is defined as less than about 0.75 inches (1.9 cm) stretched length, and for an adult, it's typically under 3 to 3.67 inches (7.5 to 9.3 cm).