Such a cute little top made in the classic ripple pattern, well before that Missoni craze!
I’ve used Lion Brand’s Microspun, which is a super soft microfiber. To substitute yarns, choose a #3 light or DK weight yarn. A summery blend is perfect. I’ve also seen this top done in a #4 yarn or worsted to make it a little bigger. With a few of your own adjustments at the armholes, it could easily be made to fit the smaller ranges of womens sizes.
You can find the pattern on my website HERE.