The normal size of a hypoechoic lesion can vary depending on the location and context. For example, in breast imaging, hypoechoic lesions smaller than 1 centimeter in size are more likely to be benign. In prostate imaging, a study assessed patients with hypoechoic lesion volume less than 0.2 cm3. In general, the size of a hypoechoic lesion is not the only factor in determining whether it is benign or malignant. Other factors such as shape, borders, and blood flow can also be important. It is important to consult with a healthcare professional to determine the significance of a hypoechoic lesion.