Heels are less than 1/2 size to big?

I just got this pair of really cute heels around 1/2 a size too big, maybe a little less, because they were only $5.

But I'd like them to fit a little better. Any tips or tricks to do this? Could I try putting something in the back of them to push my foot forward a teeny bit?

The basic shape of them is similar to these:

http://images.teamsugar.com/files/upl0/1鈥?/a>Heels are less than 1/2 size to big?
i would say put something in the toe like sock but if its open toe, that wont work..and if you put anything in the heel people will see a gap in between the shoe and your foot. i think i would just wear them as they are

blackheads