i passed about 9 clots in a week after my c-section, one was as big as my fist....
i called the post-partum line in my area and they told me that if i pass more than 4 in 24 hours i need to come in (hospital that is) luckily i didnt, i passed 3 in 24 hours though. thing is i only passed clots, no bleeding accompanied it. if you are bleeding heavily with your passing of clots, you need to go in, hope i helped