1. Blade length
The first thing to look at is the blade length. Understanding the type of work you're doing will help dictate what length of blade you require. For shrubs and small hedges, a smaller length of around 18" would be fine. For larger hedges, you would be better with a longer blade.
2. Standard or long reach
Are you trimming hedges within arms reach, or do you have tall, wider hedges that would require a long reach pole?
3. Power supply
Hedge trimmers are available in petrol, cordless battery or mains electric and each has it's placed in the market. A homeowner in a small garden where power sockets are available may find using a mains electric hedge trimmer meets their requirements, whereas a professional users may prefer a petrol powered or a cordless machine.
If you're considering a cordless machine, our short guide will help you choose.
The weight of the trimmer should be a key consideration when choosing which to buy. If you plan to operate the trimmer for long periods, it's important to ensure you're buying a trimmer that you're comfortable holding for long periods.