Sony has shipped 10.5 million units of its Move peripheral to date, IGN reports.
The figure was revealed by Sony's Gabe Ahn, a developer support engineer, following a GDC panel focusing on developing for the Move.
Ahn confirmed to IGN that the figure represented units shipped to retailers rather than sold, and includes sales of both Move and Navigation Controllers - the latter can be substituted for a Dualshock 3 pad, and is specifically designed to work with the Move.
Ahn put the Move's attach rate at 1 for every 6 PlayStation 3 consoles, though the figure of 10.5 million units shipped does not directly correspond with that estimate.
62 million PlayStation 3 consoles had been sold as of December 31 2011, which, by Ahn's ratio, suggests around 10 million sales of the Move controller alone.