This pattern can be found for free online at http://jessieathome.com/extended-ripple-free-crochet-pattern/

This ripple pattern adds a lacey look to the classic ripple. This is really more of a stitch pattern; however, there are several finished project photos with details to help you with ideas. This pattern can be used with just about any size yarn and the coordinating hook. I do not recommend novelty yarns, as the textures of the yarn can make the stitches difficult or just take away from the look of the stitch pattern.

Sizes:
Whatever size you want to make!

Yarn:
Pretty much any size “regular” yarn. Not recommended for novelty yarns

Hook:
Use a hook a few sizes longer than your yarn recommends. This stitch looks best when it is worked loosely.

Gauge:
Not important! Though you may want to make a 2 repeat swatch that is a few rows tall to determine how many repeats you need for your own finished item. (For example, if your swatch measures 10 inches, you know each repeat is 5 inches. If you are making a baby blanket and want it to be about 36 inches, you will ch enough for 7 repeats (7rep * 5 inches = 35 inches) in order to get the size you want.)
 
Stitches and Skills used:
Ch ~ chain
tc ~ treble crochet
sc ~ single crochet
sc2tog ~ single crochet 2 together (explained)
St(s) ~ stitch(es)
Sk ~ skip
Beg ~ beginning
Rep ~ repeat