Use RenderTransform to transform a TextBlock
<UserControl x:Class='SilverlightApplication3.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'> <StackPanel> <Button> <TextBlock> this is a test </TextBlock> </Button> <Button> <TextBlock> <TextBlock.RenderTransform> <ScaleTransform ScaleX="3" ScaleY="3" /> </TextBlock.RenderTransform> Foo bar </TextBlock> </Button> </StackPanel> </UserControl>