My DD is nearly 5 months old. We use Baby Beehinds Bamboo, these are one size and snap, the snap she is on is slightly to big but we use the Baby Beehinds Wool Cover which is a platic velcro (the plastic velcro snags on the wool cover but not anything else, therefore does not ruin her nice nappies when I machine wash them together), this allows me to make it a bit tighter to make up for the in between snaps. DD sleeps 12-14 hours at night and the nappy is always soaked but it has NEVER wet through the wool cover. I only use the boosters that came with the nappy and they do me fine but there is plenty off room for extra boosting.

Good Luck.

Deanne.