Could iphone 7 plus cases fit an iphone 8 plus?

Could iphone 7 plus cases fit an iphone 8 plus? - 1

Probably

Yes actually! They could easily have been named the 7s and 7s plus.

Yes.

Apple's accessories page lists cases for iphone 7/8 and 7+/8+, so it's safe to assume they are compatible.

Have been named the 7s and 7s plus.

Yes indeed

Yes