The interface size of the mini DP

There are two common descriptions for the size of the Mini DP interface, namely 7.5mm × 4.5mm and 6.4mm × 23.5mm. The specific size should be determined based on the type of interface and the usage scenario.

First size: 7.5mm × 4.5mm

This size usually refers to the physical dimensions of the Mini DisplayPort (Mini DisplayPort) interface, namely the length and width of the interface shape. This specification was defined by Apple in 2008 when they launched the Mini DisplayPort standard. The design purpose was to maintain compatibility with the standard DisplayPort protocol while reducing the interface size to fit thin devices (such as laptops, monitors, etc.). The 7.5mm × 4.5mm size makes it more compact than the standard DP interface (approximately 15.8mm × 7.5mm), while retaining the same 20-pin pinout and supporting video, audio, and data synchronous transmission. This size is widely used in Apple's MacBook series, some high-end monitors, and graphics card docking stations, becoming the mainstream specification for Mini DP interfaces.

Second size: 6.4mm × 23.5mm

This size may have two interpretations:

Interface length difference: Some sources mention 6.4mm as the "thickness" or "height" (the dimension in the insertion and removal direction) of the interface, while 23.5mm is the overall length (including the fixed latch or shell extension part). However, this data does not match the physical definition of the standard Mini DisplayPort and is more likely an error in describing the interface's peripheral structure.
Confusion with other interfaces: The 6.4mm × 23.5mm size is closer to some specialized connectors (such as some industrial equipment interfaces), but it is not related to Mini DisplayPort. Note that the DisplayPort family includes other variants (such as Micro DisplayPort), but their sizes do not reach this range. Therefore, it is necessary to carefully verify the data source.

Summary and recommendations: If you need to confirm the size of the Mini DP interface, prioritize the 7.5mm × 4.5mm specification, which is the industry-recognized standard physical specification. If you encounter the description of 6.4mm × 23.5mm, it is recommended to further verify the device model or interface type to avoid adapter issues caused by data confusion. In actual use, you can measure the length and width of the metal part of the interface or refer to the official technical documentation of the device to obtain the precise size.