From Engadget
Here's how to tell which gen AirPods you own

AirPods are difficult to identify from looks alone, so you'll need to check the model number in one of several places.
TechTrends NowFollow the next shiftTechnology · Culture · ChangeFrom Engadget

AirPods are difficult to identify from looks alone, so you'll need to check the model number in one of several places.