I'm somewhere between a size 8 and 9 and sometimes its difficult to find shoes my size! recently I bought a pair of black pumps, which were a little too big, so I got 2 pairs of insoles for them and silicone heel grips... I managed to wear them out once and then with every step I took the silicone grip would peel off and my foot would slide out and the silicone would be a mangled mess... I bought these grips and so far so good... I got 3 pairs for less than a pound each and they have proved amazing! They stick properly, (you can correct it slightly when you're sticking it down), and i can now wear my shoes!! I would perhaps recommend using a shoe horn (the packet said so too) just to make sure they don't peel while you're putting them on.