I believe they are 5.5/2.5 plugs, in my opinion the plugs really do look that size but they are about 2mm shorter than the norm and unfortunately in my case they don't make electrical contact even though they do plug in cleanly, maybe they are designed a non-standard size because another 5.5/2.5 cable Audiophonics reference 16283 has no problems. I would not recommend this cable unless you need shorter 5.5/2.5 connectors. I'm not sure if I can return the cable because sending it back would be too expensive compared to the price of the cable.