They should specify that on the website. But then the Coach website leaves a lot to be desired for 2014. The search function is so limited as to be practically useless. The descriptions aren't adequately detailed. And while the look is clean, it's also boring. I love Coach, but I would love a redesign/update on their website and stores.
To be fair they did say "For use with iPhone 5" and there is an iPhone called iPhone 5 (which is the exact same size as the 5S, as opposed to 5C) but they should be more specific for clarity
Off topic but I legit got an iPhone 5 solely for the fun designer cases and it's currently in a hardcore otterbox bc my ds is big on chucking my phone. Sigh.