Original Polaroid integral film and the current Polaroid Originals integral film are identical in their size and dimensions. Well, actually, Polaroid Originals film is a little thicker, but that's another story.
Polaroid Originals SX-70, 600 and i-Type film measures exactly 3.108 × 3.024 inches (photo area) and 4.233 x 3.483 inches (total area). That's 7.894 x 7.6801 cm (photo area) and 10.752 x 8.847 cm (total area).
Polaroid Originals Spectra/Image film is wider than it is tall, and measures exactly 2.890 x 3.574 inches (photo area) and 4.051 x 3.996 inches (total area). That's 7.341 x 9.078 cm (photo area) and 10.290 x 10.150 cm (total area).
Read more about what film to use with Polaroid and Polaroid Originals cameras