Claptrap

Not sizes, but shrink-wraps are an inner bulk
Not measures, but claptraps
are an outer hulk

Not cottons, but burlaps are a voguish stunt
Not fashions, but claptraps
are a modish front

Not tables, but road-maps are a certain ride
Not courses, but claptraps
are a bogus guide

Not top-hats, but foolscaps are a stupid sign
Not comics, but claptraps
are a wacky line

Not hustles, but pace-laps are a crucial rate
Not chases, but claptraps
are a sordid bait