Because i'm an idiot, i have purchased a std data sim for a new ipad mini.... When it requires a nano sim.
I've contacted the seller to return it, but similar deals on nano-sims are practically non-existant.
At which point sim card cutters caught my eye. like this one.
Edit : uchoob vids seem to suggest this is a doddle. Think i'll just get one - unless anyone knows any horror stories?