This top can be made in various sizes from preemie to larger adults.
Can be made with short sleeves or long

Written pattern
http://www.crochetwithclare.com/shell-stitch-top.html

Video tutorial
https://youtu.be/eF5GjqGlPuw

Long sleeves
https://www.youtube.com/watch?v=wOHzIQHk3ww&index=8&a...

This website has great measurements:
Babies and Kids http://www.childrenssizechart.com/
Adult women http://www.womenssizechart.com/
Adult men http://www.menssizechart.com/