Made to order from quality solid core Cat5e cable up to 100m in length, simply measure the distance required and add a couple of meters to be sure.
All pre-made cables are made with stranded wire for flexibility but solid core wire performs better. Though this is not usually a factor for Ethernet it can be important for other applications such as HDMI extenders. In this case it’s best to keep the cables as short as possible. We can make the cables to any length required.