How Keyboard Cat Was Born

Batman's size varies a lot in the DCAU. I think there is a Bruce Timm interview where he talks about how the character design had to change to fit in with the cast and the role they were expecting him to play.

Early in Batman TAS he was fairly lean. Then he gets bigger when the art style changes and Tim Drake shows up. He and Superman are essentially the same size in the Batman/Superman crossover episodes. Then in Justice League he seems to get smaller (or at least leaner) to be a better counterpoint to a big strong Superman. And Bruce is still quite stocky in Batman Beyond to contrast with a young lean Terry. It's generally hard to get a good feel for his height, because the length of the ears on the cowl change quite a bit.

I've met Adam West, and was surprised by how big a man he is. On screen, he always looked kind of small and skinny to me. I had no idea that Batfleck was that tall.

Well Adam West's tight batman pajamas made clear that very little of that "91kg" was muscle. So the supposed similarity based on weight is misleading. Affleck and Bale are de facto the closest to Batman's comic dimensions, simply because they are the only weight-trained actors to play the character.

That graphic is a little misleading because the size of the heads is not scaled to the axis. It looks like Affleck is a head taller than Christian Bale, for example, when he is only about 10 cm/4 inches taller.