Every garment being sold needs a swing tag which gives the name of the brand and usually the size (and usually a place for the price with barcode as well). But by making innovative swing tags that can be used as a marketing tool you help drive more sales for the brand.
A swing tag is basically a card that attaches to the garment usually with a piece of string or a joiner. Use your creativity to come up with various designs, then approach printing companies to get quotations for the various designs and finally pitch to local fashion labels.
Here are some ideas to get you started:
Swing tags that can be used as a bumper sticker (screen-printed sign vinyl)
Swing tag that can be used as a fridge magnet
Transparent swing tags
Swing tags made from sandpaper (good for work wear)