Let me proudly present you with the Nude Sergio Rossi Slingback I've got awhile ago. They are peep toes, 4 inches, Nude Patent Leather AND amazingly comfortable. I am not even joking at how comfortable these 4 inchers are. I own another pair of 4inches which is by YSL, they are not nearly as comfortable as these one.
The insole of the Sergio Rossi is made incredibly well; it fits the feet like a sock. Of course, if you don't like slingbacks, Sergio Rossi do carry this colour and style in a pump.