Same problem here. Set up iPhone 6S from a backup of iPhone 5S. After a month of following this and many other discussions in Support Communities about this problem, submitting feedback, and contacting Customer Service, I took the new iPhone to the Genius Bar at my local Apple Store. The "solution" was to restore the phone and set up as a new phone. Items in the wallet now appear in the appropriate size. Of course, I had to download all my apps, rebuild all my settings including Touch ID and passcode, reconfigure my wifi and Bluetooth connections, and sync my tones. And, of course I lost a lot of information including my Activity data since June. Oh, and did I mention that I had Activity data because I have an Apple Watch paired to my phone, which also had to be restored, paired, and configured. So much for a smooth transition from one device to another. Apple, you let me down! All told, four to five hours of work to get my phone to work as expected, more to communicate the problem to the company. And from Apple... the sound of crickets.