Apart from A4, MIRY names its boards in inches. Here's each one in centimetres.
| Board | Size (cm) | Cover |
|---|---|---|
| A4 | 21.5 x 30.2 | WR |
| 12 | 30.5 x 30.5 | WR |
| 14/12 | 35.5 x 30.5 | WR or SL |
| 15/13 | 38 x 33 | WR |
WR (water resistant): the cover seals around the map. The one for wet New Zealand races.
SL (super load): the cover is open on two sides, so loose map sheets slide in and out fast. Made for MTBO map changes.
Which size? A4 and 12 suit MTBO. The 14/12 suits adventure racing. The 15/13 is the largest, and pairs best with an Elite High frame.