I have bought a pair of summery canvas trainers which are slightly too big. I have put insoles in them and now added heel grips and they are still too big. I have worn them outside (I think they have stretched slightly) so can't return them.
Any other ideas? Would an extra pair of insoles just slip around inside? Which insoles are thickest?
The trainers are quite low at the front so I can only wear those invisible sock things (the ones that you could wear with ballet pumps). Are there thicker versions of them available?