Wee Notions AI2's (All in Two's) are available in several sizes and fasten at the sides with poppers/snaps. They have a built in waterproof layer and a snap in absorbent insert (inserts can be purchased with the nappy and extra inserts are available to buy separately). Unlike pocket nappies the same outer can be used again (unless soiled) by simply changing the insert, however it's not as easy as a pocket nappy to adjust the amount of absorbancy to suit your own childs needs.
See HERE for more information including sizing tables.
If you're new to cloth nappies, see HERE for the Wee Notions Cloth Nappy User Guide.
If you would like some help ordering a custom made nappy click HERE.