US standard paper size – ANSI

Namein × inmm × mm most similar ISO A size
Letter – ANSI A​8 12 × 11216 × 279A4

Ledger – ANSI B

11 × 17279 × 432A3

Tabloid – ANSI B

17 × 11432 × 279A3
ANSI C17 × 22432 × 559A2
ANSI D22 × 34559 × 864A1
ANSI E34 × 44864 × 1118A0
ANSI F28 × 40711 × 1016A0