"If Death Knight"; If Pet Alive...

[Vrul]

--StanceBar
local _, class = UnitClass('player')
local width
if class == 'DEATHKNIGHT' then
	width = 114
elseif class == 'DRUID' then
	width = 114
end
if width then
	CreatePanel("aPanels_StanceBar01",0,0,width,31,background,border,"BOTTOMLEFT","TOPLEFT","aPanels_MButtons01",ShapeshiftBarFrame)
	CreatePanel("aPanels_StanceBar02",0,0,width,31,background,border,"BOTTOMLEFT","TOPLEFT","aPanels_MButtons01",ShapeshiftBarFrame)
end

Change the width for each class until it fits the way you want.