Our second pair of shoes also is tied with the basic tie:
The ribbons shown are about 50" long for each foot - the exact length varies depending on your foot size. To get a similar look, buy about 3 yards of a double-sided jaquard ribbon, cut that length in half, and seal if desired. Unfortunately, I can't provide a source for the ribbon shown - I found it online ages ago, and can't find a link.
These shoes are made extra cute by tying the ribbon slightly off-center, to the outer side of the foot.