What size server rack do I need for a home network? The size of the server rack you need depends on the amount of equipment you have and your future expansion plans. A 4U to 12U rack is typically sufficient for most home networks. But how do you choose the right one? Is a wall-mounted rack enough, or do you need a larger solution? How. A network rack is essential for organizing and securing your IT and AV equipment. In this guide, we'll explore top network rack options like the TECMOJO 12U Open Frame Network Rack and. The commonly used rack rackmount network cabinet sizes are as follows: 600mm: relatively common, suitable for installation of general scale network equipment, can meet the installation needs of most standard 19 inch devices, and has a compact space utilization. 800mm: commonly used in scenarios. When picking a suitable small server rack for home office and assessing the needed size, make sure to consider the next dimensions: height (here, it is necessary to calculate the heights of all devices and add them). At this stage, it is advisable to make a layout.