The average height of a residential flagpole is 20 feet. At least two feet in addition to the height of the pole needs to cemented into the ground. The appropriate flag size for a 20-foot flagpole is between 3 feet by 5 feet or between 5 feet by 8 feet.
The normal height of a commercial flagpole is between 20 feet and 80 feet. See the chart below to find the appropriate pole height for your flag size. They will carry flags ranging in size from 5 feet by 8 feet to 20 feet by 30 feet.
Windy geographical locations can cause some pole heights to be more dangerous than others. Be sure to have a professional mount your flagpole to avoid property damage or personal injury.