I can control the width of the control but not the height, here is the code
<
UserControl xmlns:telerikInput="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Input" x:Class="RadUploadControl.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">
<Grid x:Name="LayoutRoot">
<telerikInput:RadUpload
x:Name="RadUploadSilverlightControl"
Background="#fdeed0"
Filter="Image Files (*.gif;*.jpg;*.jpeg;*.png)|*.gif;*.jpg;*.jpeg;*.png"
FilterIndex="0"
MaxFileCount="5"
IsAutomaticUpload="false"
OverwriteExistingFiles="True"
UploadServiceUrl="~/HttpHandler/SLRadUpload.ashx"
TargetFolder="~/UserImages"
IsAppendFilesEnabled="False"
Width="540"
Height="999">
</telerikInput:RadUpload>
</Grid>
</
UserControl>