Star Trek Stick-Ons

What the hell are these things? There's no explanation on the packet, other than 'Stick-ons' (doesn't sound very savoury, does it?). It's possible they were car air fresheners. Mr Kitsch got them in a fit of Trekkie collecting, and mostly because they were cheap. (He didn't keep them and this photo is from when I ebayed them. )

Ghastly mini-busts of McCoy and.. well yes, I know it's meant to be Captain Kirk, but now I'm looking at them again, I'm seeing Michael Buerk.

See what I mean?