My daughter wore this in the St. Patrick's Day parade in Harajuku twice.
100% cotton sturdy tough weave
She wore at at age 8 and 9.
But it was too big at 8 and just right at 9.
I can take measurements in cm if anyone wants them.
The tag has the very informative size "M" (purchased in the USA children's clothing section.
Can post anywhere in Japan for ¥208, with prepayment.