I’m going to tell you how tall the NHL is these days. That seems straightforward enough, but there’s some things that will be very helpful to know before you look at the numbers.
The NHL is an American league, so they keep all their vital statistics data in Imperial Measurements. They also keep these statistics in a dynamic way. In other words, if you go look at an old Leafs roster on the official Maple Leafs website, it will show you whatever values are held in the NHL database today for that player. If you want historical information, you have to go dig for it.