The RadNumericUpDown control allows you to display a header before the value. This allows you to give the user a hint on what exactly he is changing.
To set the desired header use the Header property of the RadNumericUpDown control. Here is an example.
CopyXAML
<telerikInput:RadNumericUpDown x:Name="radNumericUpDown" VerticalAlignment="Center" Header="Weight:
" />
Here is a snapshot of the result.