The album cover was drawn by John Entwistle, In 1996 Entwistle when asked about his artwork he said: "The first [Piece of artwork] release[d] is The Who By Numbers cover, which I never got paid for, so now I'm going to get paid. (laughs) We were taking it in turns to do the covers. It was Pete's turn before me and we did the Quadrophenia cover, which cost about the same as a small house back then, about 16,000 pounds. My cover cost 32 pounds. I'm releasing it in the original size; there are nine new ones after that. I've done ones of the individual members of The Who. Then I've done some of the [rolling] Stones, Bill Wyman, Ronnie Wood, Elton John and Rod Stewart."
The 1996 remaster was also remixed by Jon Astley. The end of the song "They Are All In Love" is cross-faded with the beginning of "Blue, Red and Grey". The original mix of the album did not feature this cross-fade.
On 24 December 2011 the album was remastered and reissued in Japan using the original mix of the album. The live bonus tracks from the previous edition were included on the reissue. The packaging replicates the original vinyl release of the album.