| Geometry | point |
| Geometry Description | Two horizontal lines, each 1 mm wide, spaced 2 mm apart. |
| Verified? | yes |
| Verification Method | systematic study involving people with visual impairments |
| Verified by (count) | 15 |
| Verified Technique(s) | Swell paper, UV printing, 3D printing |
| Recommended Technique(s) | Swell paper, UV printing, 3D printing |
| Planar Size (mm) | 4 by 7 |
| Symbol Height (mm) | 2 |
| Line Element Width (mm) | 1 |
| Colour (HEX) | #000000 |
| Input Source Type | journal article |
| DOI | https://doi.org/10.1080/15230406.2024.2379456 |
| Meaning / Map use | stairs |
