Daim ntawv ntaus nqi thoob ntiaj teb yog ISO 216. Daim ntawv loj raws li tus German DIN 476 txheem rau cov ntawv ntau thiab tsawg.
ISO ntawv qhov ntau thiab tsawg yog raws li ib qho piv ntawm cov square root ntawm 2, los yog kwv yees li 1: 1.4142. Muaj ntau ntau series, nrog rau ob peb qhov kev txuas ntxiv.
Daim ntawv ntaus nqi thoob ntiaj teb muaj nyob rau hauv Cascading Style Sheets (CSS): A3, A4, A5, B4, B5.
