I make one-size fits most pocket style diapers that have an opening at the back for separate inserts.  Diapers are made with new PUL, a laminated fabric that keeps wetness in, as the outside shell.  I use minky for the inner liner as it is absorbent, soft, stain resistant and easy to clean - waste just slides off it.

Each diaper comes with two microfibre inserts and two hemp-bamboo inserts that can be used in various combinations for maximum flexibility.  Microfibre absorbs quickly and the hemp-bamboo holds a lot of liquid.

I use the free patterns available at Prefold2Fitted.