Can you extend the length of this bed rail? What is the longest that it can go?

Hi Vincent, Thank you for your enquiry. The dimensions of the Safety First Secure Top Bed Rail are 48cm(W) x 42cm(H) x 7.5cm(D). The rail does not exceed these dimensions in size. If you follow the link https://www.babyonthemove.co.nz/store-locations/ this will take you to our on-line store finder. Here you can find contact details for your nearest Baby On The Move store where one of our team experts can help find a suitable solution for a product you may be searching for and assist you with any further questions regarding our range of products available. We hope this has helped with your query.