The rumors that Apple is planning to introduce a big-screen iPhone 6 this year have reached a crescendo mode, and it's not only the usual 4.7" or 4.8" sizes cited, but even larger ones, too. Bloomberg reported way back in November of last year, that Apple is planning on both a 4.7", and a 5.5" iPhone phablet of sorts for WWDC unveiling this year.
The 4.7" iPhone was referred to as a 4.8" one in subsequent rumors, while the speculative largest handset from Cupertino fluctuated in size between 5.5"-5.7", depending on whose rumors you chose to believe. Either way, truth is probably somewhere in the middle, and the fact that Apple is playing around with these sizes doesn't mean they'll materialize, especially the gigantic one.
After peeping into what Apple's iPhone portfolio might look like this year in a