The best replacement for flats is heels.

The best alternatives to flats are rated as following:
★★★★★  heels
★★★★  prefolds
★★★  clipless
★★  apartments
★★  spikes
★★  sharps
★  drums
★  houses
★  points
★  running shoes
  letters
  fruit town pirus
  trainers
  heels wedding
  spd
  plots
  clips
  tree top pirus
  house to rent
  clipless pedals
  wedges
  prefolds cloth diapers
  receiving blankets
  stilettos
  spds
  bridgestone run flats
  non run flats

Your alternative for flats is not listed? Suggest!
Speaking about flats, one probably shouldn't forget about socks.

Other search terms related to flats and their ratings are:
★★★★★ socks
★ tights
★ toe cleavage
★ leggings
★ skirts
skinny jeans
You have in mind a companion for flats and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of flats in all years. Click on graph for more.
flats
heels
prefolds