Michael Sweet Sep 19, 2025

The Chinese standard GB/T 148-1997 defines 7 media sizes called D0 to D6. The Chinese standard GB/T
1416-2021 additionally defines the ZL envelope size, which should be added to the list of Chinese media sizes:

- prc_d0_764x1064mm: D0
- prc_d1_532x760mm: D1
- prc_d2_380x528mm: D2
- prc_d3_264x376mm: D3
- prc_d4_188x260mm: D4
- prc_d5_130x184mm: D5
- prc_d6_92x126mm: D6
- prc_zl_120x230mm: ZL Envelope

The "juuro-ku-kai" (om_juuro-ku-kai_198x275mm),  "pa-kai" (om_pa-kai_267x389mm), and "dai-pa-kei" (om_dai-pa-kai_275x395mm) sizes are actually specific to Japan.

The "prc-16k" (prc_16k_146x215mm) and "prc-32k" (prc_32k_97x151mm) sizes are apparently not standard or at least the dimensions do not match any standardized sizes.

The "om_16k_184x260mm" and "om_16k_195x270mm" sizes in the "other metric" size table are also common in China and should probably be moved to Chinese table.