What problem rMQR solves
An rMQR code fits a two-dimensional code into a strip that is too short for a square code. A square QR code grows in both directions as data increases, so a thin edge, such as the side of a pen, a cable, a test tube or a narrow label, limits how much a square code can hold. rMQR grows mainly in width instead.
It keeps the family look of QR: a full finder pattern at one end, a smaller sub-finder pattern at the opposite corner, and timing patterns along the edges. Like Micro QR, it needs only a 2-module quiet zone.
Sizes
rMQR symbols come in fixed combinations of height and width. The largest symbols are 139 modules wide. Capacity depends on the size and the error correction level; the largest symbols hold a few hundred numeric digits, which is far less than a large square QR code but much more than Micro QR.
- Heights: 7, 9, 11, 13, 15 or 17 modules
- Widths: from 27 up to 139 modules
- Error correction levels: M and H
- Quiet zone: 2 modules
Support and standardization
rMQR was published as ISO/IEC 23941 in 2022. Because it is newer than QR and Micro QR, reader support is still growing; industrial scanners and some software libraries read it, while many phone camera apps may not. Test with the readers your audience actually uses.