Back in December 2012, rumors started to circulate about an upcoming Apple smartwatch called the iWatch. At first it was reported that Apple will use a 1.5" touch PMOLED made by RitDisplay. Later on in 2013 it was reported that Apple will use 1.5" PMOLEDs produced by Foxconn. Today Korea's Chosun Ilbo claims that Apple decided to use a plastic flexible OLED panel.
Apple 2011 flexible OLED watch patent
According to the reports, Apple is developing three models, with 1.3", 1.4" and 1.5" displays. They already produced a prototype 1.5" device. Chosun is quoting "industry sources" in their short article.