---
name: "libinput-measure-touch-size"
section: "1"
platform: "linux"
package: "libinput-tools"
version: "1.32.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/libinput-measure-touch-size"
---

# libinput-measure-touch-size(1)

measure touch size and orientation of devices

## NAME

libinput-measure-touch-size - measure touch size and orientation of devices

## SYNOPSIS

**libinput measure touch-size \[--help\] \[options\]** \[*/dev/input/event0\]*

## DESCRIPTION

*The* **libinput measure touch-size** *tool measures the size and orientation of a touch as provided by the kernel.* *This is an interactive tool. When executed, the tool will prompt the user to* *interact with the touch device. On termination, the tool prints a summary of the* *values seen. This data should be attached to any* *touch-size-related bug report.*

*This is a debugging tool only, its output may change at any time. Do not* *rely on the output.*

*This tool usually needs to be run as root to have access to the* */dev/input/eventX nodes.*

## OPTIONS

*If a device node is given, this tool opens that device node. Otherwise, this* *tool searches for the first node that looks like a touch-capable device and* *uses that node.*

- **--help**

  *Print help*

- **--touch-thresholds=*"down:up"***

  *Set the logical touch size thresholds to* *down* *and* *up,* *respectively. When a touch exceeds the size in* *down* *it is considered logically down. If a touch is logically down and goes below* *the size in* *up,* *it is considered logically up. The thresholds have to be in* *device-specific pressure values and it is required that* *down* *\>=* *up.*

- **--palm-threshold=*N***

  *Assume a palm threshold of* *N.* *The threshold has to be in device-specific pressure values.*

*If the touch-thresholds or the palm-threshold are not provided,* *this tool uses the thresholds provided by the device quirks (if any) or the* *built-in defaults.*

## LIBINPUT

*Part of the* **[libinput(1)](/libinput/1.md)** *suite*