Our fence rails come in 3 sizes. Our 3.6 75×32 is the most common as it’s the cheapest and keeps your posts at 1.8m gaps which is perfect for fencing. The 4.2m 75×38 is ideal if the fenced area has trees or other obstacles as it gives you room to move your posts up to a 2.1m gap. The 3.6m 87×38 is primarily for post & rail fencing but can also be used for bracing on gates if extra strength is required.