I know last week someone had mentioned that they wish green sprout baby would put a tag on their diapers with the size. I've also thought the same thing so I emailed Lyn about it. The size is on the diapers. There is a snap on the inside of the diaper that has the size etched on it. I checked mine and the snap is white. It is so obvious that I have no idea how I missed it. She is also going to start selling cloth "pull ups" ......thought I would pass this info along.