Flight passengers are allowed to bring one carry on and one personal bag in the cabin with them. Domestic Flight Carry On dimensions are 9″ x 14″ x 22″. International Flight Carry On dimensions are 9″ x 14″ x 20″, due to smaller overhead compartments. Personal Bags are limited to 9″ x 10″ x 17″. Having run into a bit of trouble concerning my jacket and scarf during my last trip, I decided to make myself a Tote Bag exactly 9″ x 10″ x 17″. Rather than count my Messenger Bag as my Personal Bag, I place the Messenger Bag inside of the Tote along with my extra sweater, scarf, snacks and the clear bag of toiletries. Now I don’t have to access anything at all from my carry on when going through security. My shoes fit nicely inside the tote, too.
I’ve posted more details in the Travel section of my website. Here is a link to the Personal Bag Page.