---
title: "USB-C connector size — 8.34 × 2.56 mm"
description: "USB-C connector: A connector, not a speed — 8.34 × 2.56 mm, reversible. Full dimensions in millimetres, centimetres and inches, and what the standard actually specif"
url: https://atoneplace.net/size/usb-c/
site: "At One Place"
---

# USB-C connector size

**USB-C connector: 8.34 × 2.56 mm**

A connector, not a speed — 8.34 × 2.56 mm, reversible.

USB-C describes the physical connector and says nothing whatsoever about speed or capability. The same port can be USB 2.0 at 480 Mbit/s or USB4 at 40 Gbit/s, can carry 5 W or 240 W, and may or may not carry video. This is the single most common source of confusion in the category: two identical-looking cables can differ by a factor of eighty in throughput. USB Power Delivery 3.1 raised the ceiling to 240 W (48 V at 5 A), which is what allows laptops and even some monitors to run from one.

## The numbers

- **Millimetres:** 8.34 × 2.56
- **Centimetres:** 0.8 × 0.3
- **Inches:** 0.33 × 0.10
- **Aspect ratio:** 3.2578 : 1
- **Area:** 0.0000 m²
- **Defined by:** USB-IF

## USB

| Size | Millimetres | Inches |
| --- | --- | --- |
| USB-C connector ← | 8.34 × 2.56 mm | 0.33 × 0.10 |
| USB 3.x | 5, 10 or 20 Gbit/s depending on generation | — |
| USB 2.0 | 480 Mbit/s, 2.5 W (500 mA at 5 V) | — |
| USB4 | 20, 40 or 80 Gbit/s; USB-C connector only | — |

## Common questions

### What size is USB-C connector?

A connector, not a speed — 8.34 × 2.56 mm, reversible.

### Which standard defines USB-C connector?

USB-IF

## Related pages

- [USB 3.x size](https://atoneplace.net/size/usb-3/)
- [USB 2.0 size](https://atoneplace.net/size/usb-2/)
- [USB4 size](https://atoneplace.net/size/usb-4/)

## Sources

- Official vendor product documentation — At One Place (/about/)