How much data does netflix use on iPhone 5?

So i wanna watch this tv show which is about 21 min per episode. If I have 7gb plan, would i still have data left if i watched 15 episodes?

I don't think so, If you have any left after that it would be VERY little. Connect to Wi-Fi, Or go somewere that has Wi-Fi.

Use Wi-Fi only.

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