Know which ovarian cyst sizes are risky , how to spot warning symptoms, and explore treatment options to protect your reproductive health. When it comes to ovarian cysts , understanding their size and potential risks is essential for your health and well-being. Ovarian cysts are fluid-filled sacs that can develop on or within the ovaries. While most cysts are benign and resolve independently, knowing the average size of an ovarian cyst and what constitutes a normal size is crucial for early detection and timely medical intervention. What size of ovarian cyst is dangerous – Generally Normal size of ovarian cyst in mm is 3 cm ... Ovarian cysts can vary significantly in size , ranging from small, benign cysts to larger ones that may pose potential health risks. Ovarian cysts are common among women of all ages, typically forming as part of the natural menstrual cycle. But there are some instances when women wonder: ‘ What size of ovarian cyst is dangerous ?’ Understanding the potential risks associated with the size of ovarian cyst is crucial, as most cysts are harmless and resolve on their own.