Not differentiating between capital letters and lower case letters

Hi,

I would like to know how I can make it so the equation on VBA doesn't differentiate between capitals letters and lower case. For the example below, I have had to put the conditions twice in order to include both capitals and lower case.

If Len(title) > length Then
title = Replace(title, "size", "")
title = Replace(title, "Size", "")
title = Replace(title, "height", "")
title = Replace(title, "Height", "")
End If
Many thanks in advance for any help.