What is Fenway Park's bag policy?

All fans entering Fenway Park will be subject to screening through the use of metal detectors. This enhanced screening is part of a league-wide initiative to increase and standardize security procedures at each Major League ballpark and is in addition to the bag check stations for fans carrying items as described below. read more

Fenway Park is a private facility and reserves the right to prohibit items any item not on the below list in the interest of public safety. Bags larger than 16"x16"x8" in size Firearms, including those held by lawfully licensed individuals or off-duty police officers of any law enforcement agency or jurisdiction. read more

They allow pretty much any reasonably sized bag inside. You will have to go through a bag check though. - Source: I go to 10 games a year. read more

Fenway Park Bag Policy. In a continuing effort to provide comprehensive and thorough security and in accordance with Major League Baseball directives, the Boston Red Sox have instituted the following procedures. All persons, bags, and personal items are subject to inspection before entering Fenway Park. read more