Well, the 1777mm in the figure equates to right about 70", so I guess my measurements (or the plan view I used) were off. If that 70" is correct, it's about an inch greater than the width of the Honda Civic. Further comparison: the length of the CLA is 182.3", compared to the Civic's 179.4"; the CLA weighs in at about 3250 pounds compared to the Civic's 2850, a big difference. Of course, the CLA is considerably more powerful at 208 HP and 258 lb-ft of torque vs. the Civic's 140 HP and 128 lb-ft.
Another comparison of the CLA, this time to the 3-series BMW sedan, gives the Bimmer 1.3" greater width and virtually identical length and also weight. BMW horsepower varies from 180 for the 320i, to 240 for the 328i, and 300 for the 335i; so depending on which model you get, it's less than, more than, or much more than the CLA250's.