12-7/8x17.25" flat from 1958. The front panel features Buffalo Bee character and bowl of cereal w/"Kids! Buffalo Bee T-Shirt And Sweat Shirt" text banner across bottom. Back has full panel featuring images of the premium shirts (and boy wearing sweat shirt) which were available for one box top and 50¢ or $1. Side panel features ad for "Blue Sox/Yellow Sox Baseball Players" premium figures which consisted of four sets of five figures for each team w/total of 40 figures. Figures were made by Lido and measured 2" to 2.25" tall and were available for one box top and 25¢ per set of five figures. Offered here are 16 in 14 different poses - 12 players and three different umpires plus ABC cameraman. Scattered lt. wear/aging, most are Fine-VF. Flat is folded along center scored line and has some scattered lt. creases to flaps. Flat is o/w an unused file copy. VF.