Says Personal item: (e.g. purse, small backpack, etc.) dimensions must not exceed 16 x 14 x 12 inches (40 x 35 x 30 cm) including handles and wheels.

Do they have a tape measure/box by the gate or hopefully at check-in @ PHX so I can repack to my smaller backpack??

Also it's an redeye to DFW. Hopefully seats in the back will be empty this Sunday?? (looks wide open on seat map today) I'd pay for the big seat upfront, but it's sold out

I'll have my Citi prestige card to take care of any fees but I'd rather save it for later...