Anyone have some real stats regarding dimensions?
Well, here it is on Amazon. That page is equally useless since that’s where we get our information from.
Sorry. 
HP fits most skimmers. Order the SP HP if you have a Hayward 1070, PacFab, SwimQuip, Sta Rite, American Products (with the flap weir) or Jacuzzi Deckmate.
Order model SP HP1080 if you have a Hayward 1080 series skimmer (the 1080s have two large tabs in the skimmer that are used to secure the lid).
Order model SP B if you have a Baker skimmer.
Source: http://www.skimpro.info/assets/SPDIMENSIONS74512.pdf