iOS 7 adds a slightly modified border radius to their icons. After Brad Ellis pointed out the changed border radius, and then seeing a few incorrect icon templates floating around, I figured I'd try my hand at one.
Border radius is approximate, but it's closer than just using standard border-radius in Sketch, or drawing a roundrect in Photoshop.
For a PSD version, check out Ricky Romero's version.
Download: iOS_7_Base_Sketch.zip