I Pulled The Trigger on an iPhone 6

[CigarNut]

Here are the dimensions the S4, S5, 6 and 6+:

Galaxy S4 (5.38 x 2.75 x 0.31 in) 4.59 oz
Galaxy S5 (5.59 x 2.85 x 0.32 in) 5.11 oz
iPhone 6 (5.43 x 2.64 x .027 in) 4.55 oz
iPhone 6+ (6.23 x 3.06 x .028 in) 6.07 oz

The iPhone 6 is about the same size as the Galaxy phones and should fit in a shirt pocket OK. The 6+ is a bit taller and wider. I figure that it will be fine in my shirt pocket most of the time.