With the start of the NHL last night, there has been lots of team reviews including those tracking things like average Height, Weight, and Age of each team. You can find the league wide averages for the past few seasons here:
Here is the the averages for the Winnipeg Jets:
Unfortunately, I don’t see these numbers for the Jets from the first two seasons. The Jets are a big, heavy team that is very young and appear to be on the upswing as they made the playoffs for the first time in 2014-15.