NIKE BLAZER MID 77"

NIKE BLAZER MID 77" Bought at Famous Footwear. SIZE: 5.5 BIG KIDS Seems the sizes are way off. We bought a 6.5 & due to being to small he only wore them twice! I measured his foot and the cm is 23.5 but the size is 6.5 on the shoe. Per Nike website a 23.5 cm is a Big Kids 5.5~hmmm. Well these are up for grabs:)