But many sizes are also useful.
Regarding the size, the length of the kerb along Wulianhua Road is generally 1 m..
The heights are: 10, 12, 15, 20, 25, 30, etc. (Unit: cm)
General widths are: 10, 12, 15, 20, 25, 30, 35, 40, 45, 50, etc. (unit centimeter)