These work great and keep the wetness in. They also measure about 12x16. That's not exact. I couldn't find a measuring tape. I can see in the future, when my baby starts eating food, that the poo smell may seep out the drawstring opening. For now though, the baby poop smell doesn't seep through.

These wet bags work great! We notice very little smell (your nose has to be right up next to it) and there's no moisture wicking. We've had these for 5 months, now; and they're washed every other day. Still work great!
The only downside is the PUL lining catches at the drawstring, which makes the bag difficult to close.

This bag is small enough to fit in my purse/diaper bag, but big enough to hold quite a few dirty diapers. It never leaks and washes great.

I love these bags. I can easily fit 5 cloth diapers in each one and makes cloth diapering on the go easy. they are very water proof and contain odors well too. They also wash very well I just turn them inside out and wash with my diapers.