Back in the days, people aren't afraid to call fat people "chubby" - not even a company that made its name selling fashionable plus-size clothing and lingerie to women! Here's a vintage Lane Bryant ad selling "charming Chubby-size Clothes" for "girls and teens too chubby to fit into regular sizes"
I would have thought that the apostrophe before the word "Teen" is perfectly okay if the word isn't in common usage the way it is in the USA (it's not that common in the UK yet) today. 'Teen is short for sixteen (or seventeen, or eighteen, etc).
What is offensive is the capitalisation. If it is an abbreviation of sixteen it should be a lower case "t". But, it is in a heading so I'm not sure if you should apply grammar too stringently.
@amanderpanderer
Does that mean I can get a girl scout uniform for my girlfriend (who no longer has hers) in the states? Is that wrong?