I recently obtained a copy of John Cyr’s wonderful book
"Developer Trays" -
https://www.johncyrphotography.com/.
Besides Mr. Cyr's fine photographs, his forward, and Lyle Rexer's introduction, the size of each tray and (in some cases) how long the photographer has been using it are listed. In a couple of cases, provenance is noted. i.e. Neil Selkirk uses a tray from Richard Avedon's darkroom to print Diane Arbus' work. Talk about channeling some mojo.
I thought it might be interesting to ask members of LFPF the type (material/brand) and size of their favorite developer tray.