Buyer decision guide
Custom Interior Door Sizes for US and Canada
Use this guide when a project includes repeated apartment openings, 8 ft doors or mixed dimensions.
Direct Answer
US and Canadian projects should quote custom door sizes from the actual schedule, keeping imperial references, metric conversions, rough openings and leaf sizes clearly separated.
Common references, not assumed stock
Schedules may include 28x80, 30x80, 32x80, 34x80, 36x80, 40x82, 42x82, 48x80 or 8 ft doors. These references should be checked against the selected construction, frame and local installation detail rather than treated as a universal stock list.
Keep dimensions unambiguous
Use separate fields for rough opening, door leaf, frame, finished wall thickness and jamb depth. If a schedule mixes feet/inches and millimetres, preserve the source value beside the conversion and identify who owns final site verification.
Size review before production
- Group repeated marks.
- Identify exceptions and oversized openings.
- Confirm slab, prehung or complete-set supply.
- Review frame, architrave and hardware preparation.
- Approve the final schedule before cutting.
Related VISFURN resources
Buyer questions
An 8 ft reference may appear in a project schedule, but stock status and final production dimensions depend on the selected product and specification.
Yes. Keep the original units and clearly label every opening so mixed schedules can be reviewed together.
No. Send the original schedule and any conversion, with rough opening and leaf references kept separate.