I've said many times how much I hate photographing anything black, it's so difficult to do... this bag belonged to my Mum but is now surplus to family requirements and is just hanging up empty. My 13 inch laptop fits in with plenty of room to spare .However I don't want to categorically say a 14" will fit , although I believe it probably  would. Please look at the photos and read the description to help make up your mind.

Looking at the bag front on: you have a lined pocket with a  good  clean velcro fastening .
Behind that is a zipped pocket, with a  good strong silver ended antler zip measuring just over 13 inches 
Inside here is another fabric zipped pocket which measures 10 inches by 6.5 inches which would be handy for keeping pens pencil etc I have flipped it out so that I could photograph it.
Behind that is a larger velcro fastened pocket where the velcro has 'furred' a little bit as this was the pocket most often opened and closed. That opening is almost 14inches wide.
Inside this there is another zipped pocket which is integral and can't be 'flipped' out, hard to measure but its approx 7.5 inches.
Then you have the main zipped pocket of the bag ,inside it measures 14 inches, its secured with a double ended Antler zip, good and strong with holes in each zip end so the bag could be secured with a small padlock if required .
Turning the bag around there is a final velcro fastened pocket  approx 14 inches wide x 8 inches deep.
It has 2 carry handles approx 3 inches high and a good strong detachable shoulder strap which fastens on the diagonal, making for extra security. The strap can be extended or shortened via two buckles and has a nice broad piece to stop the bag falling off your shoulder . 
It's a very nice, smart , well made bag.Ideal for school, college or Uni or for anyone wishing to travel with their laptop.

From a non smoking home , please ask me for any additional information. Thanks for looking.