You`re looking for what`s called Hang Tags. If you`re looking for products like this (to include flashers etc), there`s a whole gamut of other issues that I don`t know if you`ve addressed. In apparel, there are FTC rules and regulations you are required to comply with. Do you have an RN number? It`s free to apply, you can even do it online. There`s a lot more about this on Fashion-Incubator
. SuN is great for generic business information but niche sites can cover topics like this more in depth. There`s tons of companies who will make hang tags but more often, they`re looking to be your package producer to cover all your labeling needs.
~Nurture people, not products~