According to lowendmac.com, the OS 9 compatible 800Mhz iMac G4 (Jul 2002) had a 17" screen.
The second 800Mhz model (Feb 2003) was the low-end model and had a 15" screen. The high-end 17" model was bumped to 1Ghz. Neither could boot in OS 9.
The second 800Mhz model (Feb 2003) was the low-end model and had a 15" screen. The high-end 17" model was bumped to 1Ghz. Neither could boot in OS 9.