Cro-Magnon is about the same height, a larger brain case (~1500cc), and probably larger in body size than modern humans (we got smaller around the start of agriculture 15,000 - 10,000 ya). But anatomically, they were modern humans.
Brain capacity, in general:
1. Brain size average 1500 cc (larger than ours).
2. Thicker, more robust bones.
3. Cranium large, long, low with marked brow ridges.
4. Forehead higher than Homo erectus but lower than Homo sapiens.
5. Face projecting forward; nose large.
6. Front teeth large, heavily worn as if used as a vice to hold objects.
7. No chin