I won this diaper through a Smart Bottoms facebook promotion and have not been compensated by the company for this review. My opinions and experiences are genuine and are just that, my opinions and experiences - with some great company info from their website including links.
Smart Bottoms recently released a Newborn diaper that fits most babies 6-16 pounds and comes in 3 solid colors and 2 fantastic prints. Although the diaper is sold as an all in one (AIO), as you'll see it has many features and options including a snap-in layer, umbilical cut out, large and small size settings, and pocket opening for boosters and faster cleaning and dry times.
(Emerson print)
The Newborn AIO comes in several colors including (pictured below) Flamingo, Duckling, Bluebird, Ella and Emerson. These can be purchased directly from the Smart Bottoms website and retail for $18 ea. They're a versatile newborn diaper and I wish I had an entire collection for my NB - Isn't this floral print precious?!
My 3rd son, born just 3 weeks ago, was a healthy 9.5 pounds. Cloth diapering a newborn is a new experience for me. I started cloth with my 2nd son when he was 8 months old and we have always used one-size pockets and covers/prefolds. Newborns offer new challenges including increased number of changes, breast milk poo, and varying fit.
I purchased one-size pocket diapers in anticipation of my newborns arrival that range from 8-35 pounds. I am still surprised and disappointed to find (I keep trying!) that they are huge on him! They're so big that I can't use them. I have all this perfectly good prepped cloth sitting here waiting...meanwhile I'm wasting disposables. I wish I would have bought a stash of newborn diapers.
As you can see in the photo below, the Smart Bottoms Born Smart Newborn Diaper is considerably smaller then even the smallest setting on the one-size diapers in our stash (these are some of my favorites). The Bumtique our first work at home Mom (WAHM) pocket diaper, Alva Baby pockets (straight from China - literally - they came to my door straight from China), and Bum Genuis 4.0s a partially made in USA pocket diaper. 
The Born Smart Newborn diaper fits most babies from 6-16 pounds and fit my newborn right away! I know the company calls it an AIO, but it is much more versatile! The diaper offers a 3-layered organic cotton base sewn into the diaper and a snap-in 4 layer insert (pictured below)! It has a single gusset and a one-row snap up feature in the front for small and large size settings. But that's not all.....
Underneath the sewn-in layer is a pocket opening. It's perfect for adding a quick absorbing microfiber or natural fiber doubler such as hemp or bamboo to increase absorbency. As you can see, the sewn in layer can be lifted and placed over the waterproof layer for easy cleaning and faster drying.
Once the insert is snapped in, both layers can be tucked under the diapers waterproof PUL to help contain blowouts. These layers can also act as an ultra absorbent base for your newborn prefold. The diaper closes with a single side snap (pictured below) that creates flaps allowing for the newborn's legs to move freely. I think this is a perfect diaper, but my personal preference is to have 2 side-adjustment snaps (I would consider sending this out to get a 2nd) to get better closure on my newborn's legs.
The front of the diaper offers adjustments in girth and length. Girth is adjusted with the single side snap and one top row of snaps. Length is adjusted with 2 rise snaps. When left open the rise snaps leave the diaper in it's larger setting, but can be snapped up for a smaller fit.
Here is the Smart Bottoms Born Smart Newborn Diaper on my newborn! This is an action shot - staying still for diaper changes is boring anyway! Unlike our one-size pockets (which cover the umbilical area, even when folded down) the umbilical cutout allows for unrestricted healing and air flow. The NB diaper is set to the larger setting, without the rise snaps snapped, and is stuffed with the snap-in insert and a microfiber booster in the pocket for increased absorbency.
If you're shopping for newborn diapers the Smart Bottoms Born Smart Newborn Diaper is a great purchase. Depending on your budget, and how frequently you want to do laundry, a starter set can include any number of diapers. After your newborn has outgrown the NB diapers, they can always be saved for future babies, donated to family/friends, and if in good condition traded/sold to fund your next cloth purchase!