You can fit your lunch in there. You just have to rethink how you pack it. Take mine in my Metropolis all the time. That and a change of clothes for work rolled up along with other things. Plenty of room, the bag will be big, but there will be a day when you need to take something and you will be glad that you have the extra room. Days where you don't want to wear or carry a jacket and you can just roll it up and put it in there.