Banners will not be hung in fair territory or carried while the game is in progress due to sightline interference. With the approval of the Camelback Ranch - Glendale, Los Angeles Dodgers or Chicago White Sox, signs or banners, which are not commercial in nature, obscene, or cause a disturbance among other guests, may be displayed in an area other than the field of play. Banners larger than 2' x 3' will not be allowed, however.
I'm not sure I bet if you call the box office they can let you know
I don't specifically know about banners sizes. Did not see any people with any banners
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