Note that when you said "Smaller than 7 size" Most All of us would think Smaller shot, not a smaller number. With shot just as in the gauge of the shotgun a smaller number = a larger size. Thus we do not think of a 12 gauge as being smaller than a 20 gauge, Nor a size 6 shot being smaller than a size 7.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra