Due out in February 2018, Funko will be releasing small plush keychain figures. They're in blind boxes, so you don't know exactly what you're going to get. Each are between 2.5" and 3" tall and cab be clipped.
In addition to Boba Fett, you can find Princess Leia, a Jawa, Yoda, Darth Vader, Greedo, C-3PO, and an Ewok.
Helmet nod to Action Figure Insider for the heads up.