Update to version 0.3.0. The unit field is made bigger by default.
If still not enough, if your dashboard version is 2.24.2 or higher, you can override the CSS of gauge texts.
There is 3 font sizes used in gauge, you can change them individually. But be aware, if you use different layout sizes for the artless-gauges you are using, you'll need to target them individually because of the artless-gauge tries to figure out best font sizes for different size of layout. (2x2 font sizes are smaller than 4x4)
