The "5YL Companion" Key Chain is slated to be the next release by Kaws. Some speculate that these are 3" in height and will retail for about $15(USD). It's pure speculation for now, as no official word has been released yet... Check back for updates here on Always Seen though.
The official word is out and it looks like the "5YL Companion" Key Chain is actually 5 cm in height and retails for about $12(USD). They are currently available at Colette Paris, but please be aware that they are priced way above retail($27 USD to be exact). That seems to be the norm for every place that sells Kaws though. [direct link]