An endometrial thickness of 0.6 cm is normal. Endometrial thickness at 0.6cm is the thickness of the endometrium measured by ultrasonography. Generally the thickness of the endometrium at 0.6 cm can be during the period just after menstruation, that is, during the follicular growth phase. the thickness of the endometrium, which is monitored by ultrasound. The thickness of the endometrium is influenced by ovarian factors. The endometrium is thickest before menstruation and can generally reach about 1.8 cm. With the onset of menstruation, the endometrium starts to peel off and may reach 0.4mm during menstruation. with the onset of the next menstrual cycle, the endometrium starts to grow thicker again. So to determine if the endometrial lining thickness is normal, it depends on what period of menstruation it is in? If the endometrium is 0.6cm before menstruation, it can be said that the endometrium is too thin.