If you can make it to the MetLife Stadium without a bag, it might save you some hassle and extra security checks. But if you do need a bag with you, there are several restrictions in place which you have to adhere to, otherwise you will have to take the bag back to your car.
Bags which are permitted to enter the stadium include any type of clear plastic, vinyl, or PVC bags that are 12” x 6” x 12” or less in size. Non-clear and small purses/handbags (clutch-type bags) that are 4.5” x 6.5” or less in size are also allowed. Other kinds of bags allowed are one-gallon clear plastic freezer bag (like Ziploc), and bags which are a medical necessity. Only one bag per person is allowed and medical bags will be inspected at a designated place.
Any type of non-clear bag exceeding 4.5” x 6.5” in size including non-clear purses/handbags, camera or binocular cases, backpacks, fanny packs, diaper bags, and briefcases/computer bags are not allowed to enter the premises. Seat cushions of any size are also banned except those for medical needs.