Adidas generally keeps quiet on the relative rarity of its sneakers, opting to not to release production numbers. This rings especially true for Yeezy Boosts, a line of sneakers that the brand is always hesitant to say more than it needs to about.
While hard numbers are still difficult to come by, leaker group Yeezy Mafia dropped the below infographic that shows which of the Adidas Yeezy Boost 350 V2s are the rarest. Note this doesn't capture the full extent of the Kanye West x Adidas line—missing are the Boost 750, the first Boost 350, and the Powerphase.
According to Yeezy Mafia, the most widely produced pair yet is the "Cream" Adidas Yeezy Boost 350 V2, and the rarest are the individual pairs from last year's trio of Black Friday releases.