knee high boot help?

[TripTrapTripTrapOverTheBridge]

I need a new pair of knee highs but,due to school run,I would rather they had a good wedge heel (I don't do flats).Not having much luck finding any though.

Can anyone help?
Preferably not black but open to black if needs be lol
Can't be too expensive either

I've been looking for these too...I want a rubber wedge heel as they are as comfy as slippers.

Found some!!

Like these
www.debenhams.com/webapp/wcs/stores/servlet/prod_10701_10001_56308+1668720151_-1

Debenhams also have different ones in black or grey,still looking through :)

Now,what colour would look best if I get a short emerald green coat and a blue or purple blazer?hmm