Couple of Naughty America's movies were like that, the girls looked bigger (also Dorcel "Being a porn performer"). I forgot to add that it also might be my VR play though. I used Samsung VR but last week I switched to Skybox and it's way better to play vids and adjust parameters.
The Dorcel movie is old and it was utter crap and it cost me like 20 bucks!
They only made like one or two movies though and they sure as hell didn't know how to make a proper VR.
The older NA were a bit strange in size (and they were also using a strange format so the videos only look normal in Whirligig, which is a worthless VR player today), but for the past year they have been very good in size. Almost all of the VR up until a year ago were bad in size and quality I would say western and JAV.
All the JAV up until just a few months ago were completely way off in size and the quality in general absolutely sucked. But like I said, thank heaven things are definitely getting better now.
I'm sure the VR players play a role in weird sizes etc. I have a Vive and I ONLY use Virtual Desktop which is the absolute best player imo. It always shows correct size and works perfectly with all movies.