Set Padding for Button
<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Canvas" Height="244" Width="242"> <Canvas> <Button Canvas.Left="119" Canvas.Top="24" Name="button1" Width="70" Height="23" >Button</Button> <Button Canvas.Left="44" Canvas.Top="69" Name="button2">Button2 is quite wide</Button> <Button Canvas.Left="78" Canvas.Top="119" Name="button3" Padding="10 2" >Button</Button> </Canvas> </Window>