These bags fit within most US airlines' domestic carry-on size guidelines. Be sure to check your airline's specific policy!
Many airlines currently allow a primary carry-on bag (up to 22" x 14" x 9") plus an additional personal item, such as a briefcase. In this case, the best way to carry your driver's gear on the plane is with a helmet bag and a suit tote case. The helmet bag counts as your primary carry-on bag, and the suit tote case qualifies as a briefcase.