Shoes too big

[pinkorchid1]

I've bought some gorgeous new shoes in the sale to wear to a wedding. They are supposed to be a 6.5 but are actually a 7.
Does anyone have any recommendations on something comfortable to stop them slipping off my heel. I've put in in-soles so they feel snug all over but still slip on my heel.

How about padded heel grips? Amazon sell them about £7

I used to put cotton, tissue paper or sponge in the toe.

Yes cotton wool should be OK as a one-off. Remember not to take your shoes off in front of anyone

Yes cotton wool could work. I've got some heel pad things but they don't sip the slipping. Maybe I should try the gel ones instead.

Leather insoles, you can get full or half sole. Takes shoes down half a size. Amazon do them really cheap.

Leather heel liners that stick at the back across the heel and are padded. Something like this:
www.johnlewis.com/cherry-blossom-suede-heel-grip-grey/p3623187?sku=237538563&s_ppc=2dx92700046623964151&tmad=c&tmcampid=2&gclid=Cj0KCQiAyp7yBRCwARIsABfQsnQS8Q-ErPsRH4lnnW3zU5W1n2VOlSxa2BNb3IqJ3k3EQXuA-e19M0IaAjc7EALw_wcB&gclsrc=aw.ds

www.boots.com/boots-leather-heel-liners-one-size-1-pair-unisex

Need to see the shoes so can best advise (also cos I love shoes and am nosey).