You should follow us in the UK - decide to change to metric in a flurry of technocratic European-community idealism, then get halfway (or 0.5 of the way) and lose momentum, get stuck, revert to imperial, then decide to try and go for for metric again, then lose interest in the whole business and decide 'what the hell' and let everyone use a mixture of both systems according to personal preference.
So short distances can be in inches or cm, long distances are more often in miles, heights of people are in feet and inches but other things more often in cm, weights of people are in stone but weights of foodstuffs are in kg, temperatures are C or F depending on your age and generation (F means absolutely nothing to me and it infuriates me that so many people still use it). Alcohol and milk are officially in ltrs but everyone still thinks in pints (definitely for booze). And its not unknown to buy things with one dimension given in inches and the other in cm.
(These days, because I can never remember how many yards there are in a mile - its some stupid number that makes no sense - I tend to have to convert from one to the other by remembering 3 feet in a yard, 12" in a foot, 2.54cm in an inch, 100,000cm in a km, and a km is 5/8 of a mile.