3 layers of which the back & the middle are flannel (I like the rag effect better this way - thicker ribs)
the top layer can be a mixture of whatever you want, I like to use flannelette, cotton prints and fleece, although satin is also nice.
Basic crib size is 36" x 48', which works out to 48 - 8"x8" squares per layer
I ALWAYS draw my pattern out first and just align each colour diagonally across the quilt, so I know exactly how many of each colour to cut.
Once I have my 3 layers of squares 'sandwiched', and the diagonal stitch sewn through each, the piecing begins.
First, 9-blocks, consisting of 3x3 of the 8" squares sewn together to make a bigger block, with at least a 1" rib sticking out (the rib is the seam allowance that you later clip to become ragged) I like to make my quilts with a 1" rib, it takes more fabric, which in turn means more cost to make, but the effect if so beautiful in the end.
I was inspired by a girl selling her rag quilts on Ebay and one crib quilt with a pillow was up over $140 and her quilts were beautiful - with rich, soft ribs and plush fabrics and thought WOW - that's how you make a rag quilt.
I will post detailed instructions of making a rag quilt .. eventually