This packaging is designed to fit acoustic guitars and guitars with hard cases. Internal Measurement 22x49 cm Maximum Length 130cm Our High quality double walled telescopic cardboard boxes are industry leading in assuring the protection of guitars in storage or transit and have been used by us to transport tens of thousands of guitars. Our boxes come in two parts which allow the height of the box to be adjusted to your guitar's correct size. This is a simple way to efficiently pack all types of guitar while stopping the guitar moving around in transit. Made from high quality double walled cardboard, that are designed to provide extra strength allowing to withstand heavier loads and handling, our boxes are the ultimate packaging for transporting your instrument. If you need any help with packaging your guitar, then we have made a video that breaks down the process in a step-by-step guide that you can find here: If you are a regular buyer of our boxes then please get in touch with us as we can offer a trade discount for bulk purchasing.