All i know is they are MUCH longer then the first set i bought back in 2016. They certainly should NOT be labeled crew socks. I have a 10-10.5 shoe size and when i ordered the size 6-12 i was shocked how long they were. And there FAR tighter around my upper calf then the other pair were which were allegedly exactly the same product. With these new ones i have to fold them down or else there so tight they leave a mark around my leg.