Polo Blue is probably the name you know best, but Ralph Lauren's range goes further, with Polo Red, Romance, the original Ralph and Polo Black all listed here.
Most bottles are Eau de Toilette, a fair share are Eau de Parfum, and a few come as Parfum or Eau de Cologne, in sizes from 30 ml up to 125 ml.
Finding the best price
Since Ralph Lauren prices vary a lot from one country to another, comparing the final price including shipping to your own country is the quickest way to see which shop actually offers the better deal.