Icon export @x ratio from iPhone 5 to 6+?

If I’m designing icons/images in native iPhone 5 resolution, what @x multiple do I need to export them at for iPhone 6+? Just use @2x? That’s too big right? Example: an icon is 44px x 44px. If I export at @2x it’s 88px. That’s too large for 6+ right? What’s the right multiple or ratio from 5 to 6+. In the past, from non-retina to retina the ratio was just doubled. So an icon of 22px would be 44px. Very annoying for Apple to do this... :/ Thank you!