I knit this shrug when Sabrina was 6 months old in the 6 month size. As of today, she is 14 months and still wearing this little sweater. She is on the petite side, but just a little. I'm very surprised at how long she's been able to wear this.
I'm knitting another one for my cousin that's expecting and after that, I think I'll knit one the next size up (18 months) for Sabrina and we'll see how long she can wear it this time.
She's become quite the adventurous little one!