THPDFPageSize Type

UserDefined keeps an application-defined size with manually set Width and Height
Letter, Legal, Folio, Executive, Tabloid, Ledger, and Size8x11 name office and North American paper
A0 through A10, plus QuadA0 and DoubA0, name ISO 216 A-series paper
B0Plus through B10 name ISO B-series paper
EnvB4, EnvB5, EnvC6, EnvDL, EnvMonarch, Env9, Env10, Env11, and C5 name envelope sizes
ANSIA through ANSIE and ARCHA through ARCHE1 name ANSI and ARCH engineering sheets
Shiroku, G1K, Cut8, and the 8K/16K variants name Asian paper sizes
P2R through P24R, including P4D and S8R, name postcard sizes
USBC, EUBC, ASBC, ID1 through ID3, OneInch, TwoInch, L2Inch, and USVisa name business-card, ID, and fixed-inch sizes

Each ps-prefixed name is a source-compatibility alias of the no-prefix name that shares its ordinal value