I've thankfully had pretty good parents who send appropriate clothing ( although some need a reminder!) but if this was happening to me, I would likely buy some used clothing and keep it on hand. I have it in my contract that I don't supply these things but as the years go by, I pick up things here and there to have on hand. It's not ideal because the parents really should be supplying these items but I'm not going to punish a child for their parents stupidity. I've had to use my spare clothing/shoes a few times and the parents usually end up bringing the appropriate clothing soon after! Most dads don't like when their little boy has to wear purple/pink clothing but sometimes that's all I have on hand that will fit them