1957 Topps baseball set would yield the standard card size that would forever change the hobby. 2 ½ x 3 ½, just like 24 seconds, 60 feet 6 inches and 100 yards. Perfection. Anything smaller than those dimensions are considered mini’s anything larger are considered oversized cards. This was a subtle change to the previous cards but one thing I can guarantee would be that 100 years from now the 2 ½ x 3 ½ will remain in vogue.
Also as mentioned earlier 1957 would be the first year Topps had all four major sports though it would only last that year for a while.