Working life. You may have heard about the cervical screening programme that has been very successful and has significantly reduced the incidence of cervical cancer since it started in 1998.
24.8 cm = size 7. 25.4 cm = size 7.5. 25.7 cm = size 8. 26.0 cm = size 8.5. 26.7 cm = size 9. 27.0 cm = size 9.5. 27.3 cm = size 10. 27.9 cm = size 10.5. Roughly speaking, the shoe size goes up one size for each additional centimeter in length.
At this point, this person should consider exchanging the size 8 to an 8-wide; but what tends to happen is the person will try to exchange the size 8 to the next whole size up, which would be size 9. Unfortunately, all this does is make the shoe longer and the shoe will most likely still have a narrow fit.