The double zig-zag vamp was popular from 1805-1815. The popularity of the oval toe precedes that of the square toe, which came in to high fashion from 1815-1830. The vamp and rounded toe of these shoes dates them to about 1805-1815.
These shoes, commonly called slippers in this period, were likely made to match a specific outfit. They may have been made to match a wedding gown. Flimsy fabric shoes such as this were very popular, but provided no support and quickly were soiled and damaged. They were purely decorative and worn by women who were expected to stay primarily indoors and not required to do any work.