How to stretch sandals?
Answer from: Paul K.:
You can stretch synthetic sandals if you smear them with a greasy cream on the inside. Leave the cream on for a couple of hours, then put the shoes on and walk around in them for 30-40 minutes.
Natural leather will soften and stretch under the influence of alcohol or vodka. Soak the inside of your sandals in rubbing alcohol and wear them for an hour or more.