This fabulous New Zealand Oregon timber beam measures 200mm by 200mm. The longest length we have is a little over 5m long and we have some shorter lengths at around 4.3m long. This timber is not treated but New Zealand Oregon is sufficiently durable for outside/exterior construction or landscaping purposes. We also have a slightly smaller beam at 150x150mm in the New Zealand Oregon. This product is a sample from our huge range of timber