Crochet Granny Ripple Video Tutorial
For the granny ripple you will need a multiple of 18.
If you are making a baby blanket make a ch of 162.
For an afghan make a ch of 234.
If you want anything bigger like for a queen size bed then make the ch longer as long as it’s a multiple of 18, then measure it on the bed.
Repeat the pattern for a length desired for your project.