Tree Size Guide
Semi-mature trees are graded by the girth (circumference) of the trunk measured 1 metre above ground level. This is a better way to gauge of the maturity of the tree than simply to measure it’s height. Height will of course vary considerably depending on the species chosen.
| Tree Girth (cm) | Nominal Dia. (cm) | Nominal Dia. (inches) | Approx Height |
| 6-8 | 2.2 | 0.9 | 2.4-2.75m (8-9′) |
| 10-12 | 3.5 | 1.4 | 2.75-3m (9-10′) |
| 12-14 | 4.1 | 1.6 | 3-3.5m (10-12′) |
| 14-16 | 4.8 | 1.9 | 3.5-4.25m (12-14) |
| 16-18 | 5.4 | 2.1 | 4.25-5m (14-16′) |
| 18-20 | 6.0 | 2.4 | 5m+ (16′+) |
| 20-25 | 7.2 | 2.8 | 4-6m (13-19′) |
| 25-30 | 8.8 | 3.5 | 5-6m (16-19′) |
| 30-35 | 10.3 | 4.1 | 6-7m (19-23′) |
| 35-40 | 11.9 | 4.7 | 6-8m (19-26′) |
| 40-45 | 13.5 | 5.3 | 6-8m (19-26′) |
| 45-50 | 15.1 | 5.9 | 6-8m (19-26′) |
| 50-60 | 17.5 | 6.9 | 7-8m (19-26′) |
| 60-70 | 20.7 | 8.1 | 7-9m (19-30′) |
| 70-80 | 23.9 | 9.4 | 7-9m (19-30′) |
| 80-90 | 27.0 | 10.6 | 8-10m (26-33′) |
| 90-100 | 30.2 | 11.9 | 8-12m (26-40′) |
| 100-120 | 44.6 | 17.6 | 8-12m (26-40′) |
Golf Ball 13cm girth
Tennis Ball 20cm girth
Football 70cm girth