In reply to peebles boy:
Hillsound trail crampons are the real deal If you're after mini crampons . I've used them for everything from hill walking , trail running to going to the shops and delivery newspapers . I have even cycled whilst wearing them .
Big enough spikes to be functional , small enough to be unobtrusive .
Pricy though , and not as widely available as microspikes or yaktrax.
They may be overkill for pavement walking though . Something like petzl spiky or cheapo supermarket version might be better . Just remember , rubber will not grip on snow or ice so the more metal on the design the better .