sounds like a scam to me, why not just list what sizes you DONT have available?
We had some leftover shirts from 2017 Nurses Week and we want to give them away!
We do not have every color for each size. If we don’t have the color you chose, then we’ll send you a random color.
These shirts will be given away on a first come first serve basis. Not all sizes are guaranteed to be shipped. We apologize if we run out of a specific size by the time you place your order. If you place an order for a size that we DO NOT have, that order WILL NOT get shipped. Thank you for understanding!