What are the OHO Pro dimensions? #6540 March 18, 2021 21:58 Updated The watch face is 45x38x10mm or 1.78x1.50x0.40 inches. Related articles Will the OHO Pro fit my wrist? Do you need a smartphone to use the OHO Pro? How accurate are the health readings? Help! I can’t read the small font in the manual Comments 0 comments Article is closed for comments.