The size of a carry-on suitcase can vary slightly depending on the airline. However, the standard domestic carry-on luggage size for most airlines is around 22 inches tall, 14 inches wide, and 9 inches deep. This is calculated by measuring the height, width, and depth of the suitcase, including any wheels and handles. For example, United Airlines specifies a maximum carry-on size of 22 inches long, 14 inches wide, and 9 inches high, including handles and wheels
. It's important to note that different airlines may have slightly different size restrictions, so it's always best to check with your specific airline before traveling.
