Blue & white always look amazing together!
The zippered detail on the back is fully functional - this would look so cute with high waisted jeans and the zipper zipped up half way.
The sleeves have a rolled cuff.
A looser fit, Sara is a size 8 and opted to size down to a small.
Measurement across the bust, with the garment laying flat (double the measurement for the circumference):
Small 22" // Medium 22.5" // Large 23"