Paper Standards collects practical CAD plotting guidance for this topic within Paper Sizes & Margins. Use these articles for setup, verification, troubleshooting and reliable final output.
CAD plotting commonly uses three paper families: ISO A-series, ANSI engineering sizes and ARCH architectural sizes. Choose the project standard first, then confirm that the selected printer or PC3 actually supports that physical sheet.
ISO, ANSI and ARCH sheets can serve similar drawing purposes while having different physical dimensions. Follow the project standard exactly and never substitute a near-size simply because it appears in the printer list.