120 Foot Economy Backstroke Flags (Red/White/Blue) The pre-strung vinyl flags are 9 x 12 inches and are made of 4 gauge virgin polyethylene. These triangle pennants are double sewn on plastic covered, high strength, sag-resistant rope. The 120 foot String measures 120 foot x 9 inch x 12 inch and contains 100 pennants per string. 60 foot strings are also available but sold separately. Choose from a variety of colors!