I searched on the Internet to find relevant information about the real tire dimensions mounted on different rims. Yes, are plenty information out there but not the needed one. So I choose to measure myself the tires that I have.
Those are the results:
700x25c Mavic Yksion Pro GripLink (front): 26mm width
700x25c Mavic Yksion Pro PowerLink (rear): 26mm width
Both are mounted on Mavic Ksyrium Elite wheels (17 mm internal rim width), pressure 7.7 bars (110 PSI)
700x25c Mavic Yksion Elite Guard (front and rear): 24.5mm width
Both are mounted on Mavic Cosmic Pro Carbon Exalith wheels (13 mm internal rim width, 19mm external), pressure 7.7 bars (110 PSI).
700x23c Hutchinson Atom Comp (front and rear): 23mm width
Both are mounted on DT Swiss RR585 (RR1.2) rims (14 mm internal rim width, 19.5mm external), pressure 8.7 bars (125 PSI)