I did create few icons for Chat, Email and Camera apps icons,
I learnt how to create pixel perfect and both size same icon, but i can't i check 58px by 58px but look weird so i made 58px in height just, width are different of all icons.
I hope so dribbler like this icons.
Don't know icons is good or not but shared with you of all.
Download PSD file and Use icon in iOS Design.