When you order fencing, you will be asked how many sections you will need. Depending on what product, the length of fencing panels varies. For example, heras panels are 3.5m long, while crowd control barriers are 2.5m long. Once you figure out the area that you need partitioning, measure the area and tell the fencing experts at TopFenceHire.com – they will work out the best number of fencing panels for your job.