Is that per hole or per cage row?
Funny you should ask. I can get the actual measurements of what I'm looking for later today when I visit the farm...
In total, 13-17 holes total for caging. 2 for Holland Lops, the rest for large and giant breeds (Checkered giants, palominos, standard rex), with 2 for separating the boys and girls until they're big enough to be sold or sent for auction.
I haven't picked up the Rex pair, palomino pair, or the HL and Checkered bucks and will next month... which is the only reasons mine fit into 4 cages at present. I've been using Vari Kennels and various other easily disinfected containers for overflow.