The style is a modern adaptation of an old Akha hunting whistle. Each one is a faithful representation of a bird of Northern Thailand with details described on the package. Made of handcrafted oven-fired clay and painted with brilliant non-toxic acrylic colour. Whistle sounds differ and are random, not a true representation. Threaded with a waxed string that adjusts from 7.5in (19cm) to 15in (38cm). Sorry no choice. (You can read more about these items at http://www.mirrorartgroup.org/web/projects/proj-whistle-akha.html)