The sizes are as follows:
XS (0-2), S (4), M (6-8), L (10-12), XL (14-16), 2XL (18-20), 3XL (22-24), 4XL (26-28), 5XL (30-32)
The dresses are true to fit. You should select the size that you wear in shirts.
Yes. I can sell in bulk.
The dress is a poly/ cotton blend 20/80. No, it is not see-through. It is very sturdy and made like a uniform, not like scrubs.