VANELi Aliz Slingback Pump

Price Range: $$

At Nordstrom:
Rating: 4.2 out of 5 stars – 136 ratings
Includes a few 5 star reviews from narrow buyers, a couple of whom recommended ordering a 1/2 size up.
Also includes a review from a narrow buyer who said the narrow width was too narrow, a review from a buyer who normally wears medium width shoes but preferred the narrow width in this shoe, and a review from a narrow buyer who tried multiple sizes and said they all squeaked when walking (some other reviewers also mentioned squeaking).
Available in narrow and slim widths.
View shoe on Nordstrom site

At Zappos.com:
Rating: 4 out of 5 stars – 184 ratings
Includes several 5 star reviews from narrow buyers –
one reviewer sized up a 1/2 size, and another sized up a full size.
Includes a 4 star review from a narrow buyer who wore them to a wedding and said they left red marks at the base of big toes, and were worn with an arch support band.
Also includes a couple reviews that said the narrow width was not narrow enough, and a couple reviews that said the narrow width was too narrow (especially in toe area).
View shoe on Zappos site