Uploading Max file size allowed in telerik rad editor

Goto :

1. C:\Program Files\Common Files\Microsoft Shared\web server extensions\wpresources\RadEditorSharePoint\5.8.1.0__1f131a624888eeed\Resources

2. open  ConfigFile.xml

add below code

<configuration>

<property name="ToolbarMode">ShowOnFocus</property>

<property name="MaxDocumentSize">104857600</property>

<property name="MaxImageSize">104857600</property>

<property name="ToolsWidth">680px</property>

</configuration>