This the 3rd attempt to buy socks that fit in the past year.  It seems that sizing these days is based on a different standard than even from a more recent past.  The 1st pair I bought using a size guide exactly as I have used in the past; they were vastly too small.  The next set I bought one size up; they were tighter than I would like, and even after washing they remain tight.  This purchases is the closest best match, but now are a tad too loose, but I think will be comfortable.  In a shoe, they fit fine.  On the bare floor they are a little loose on the surface and run a risking of tripping me up.  What has changed in this market?