Cloth-eez Doublers
Organic Unbleached: 
Organic White:
New version doublers are the the same sizes and now have rounded corners instead of squared off corners
Doublers add extra absorbency in any diaper. Here are some examples.
small in a Blueberry Simplex AIO size small
Doublers are also useful for longer (night) naps. Doublers are useful the whole diapering time, so you might as well have some on hand right from the start.
small in a Workhorse small
small in Workhorse medium
large in Workhorse large
You can put either large or small doublers in the small or medium diapers. Newborn prefolds are enough absorbency on their own for most newborns, so most will not use any doubler with the newborn prefolds, but I show the picture so you can see the size of them after washing.
Large shown in large Workhorse diaper
The same lovely prefold fabric as our beloved Cloth-eez® prefolds in a doubler sizes. All sizes 8 layers (8-ply) of 100% cotton. I love the prefold fabric because it's so soft and pliable. It is quilty just like prefolds are so they come out of the dryer curly and need to be flattened out by hand a bit. This is the nature of the twill prefold fabric. I like to match fabrics. When I use a prefold or a Workhorse diaper and choose to add a doubler, I like to use the same fabric, even though that doesn't really matter of course. We call the white version Workhorse because it matches the Workhorse diapers, but really it's just white, unbleached or organic as the choice. They really the same except for the fabric choice. Organic is unbleached organic cotton. As an alternative use, you can use 2 together instead of those smelly microfiber inserts. This prefold fabric washes very easily and doesn't hold stink because it is 100% cotton. And best of of all, they are very inexpensive. Doublers add additional absorbency in any style diaper. You can fit the size small into the newborn Workhorse diaper. Made in the Pakistan.
Small 3.5"x 9.5" after shrinkage (yellow edges)
Large 4"x 12" after shrinkage (no color at edges)