Change Widht\Height of list Field in List forms SharePoint with CSS

A quick tip on how to change Widht\Height of list Field in List forms in SharePoint with CSS

I have changed Widht\Height of description field in my example
1. Open the list form page in designer.
2. Just below where all the assemblies are refrenced add the below CSS

<style type="text/css">

.ms-long{

width:100px;

}

textarea.ms-long{

    width: 100%;

}

</style>

that's it.