I am wearing a Large Rearz night time prefold with 3 toddler sized prefolds inside it. I always use at least 4 adult sized diaper pins regardless of how thick it is. Then one daytime flannel lined plastic pants turned inside so the cloth will absorb some leakage if it happens, and then a night time plastic pant over that. What I am wearing is so thick that I was walking like a baby learning to walk for the first time!