def content_size(sizes, piece)
        sizes[piece.row.item_type.demodulize.downcase.to_sym] || sizes[:default]
      end
def content_size(sizes, piece)
        sizes[piece.row.item_type.demodulize.downcase.to_sym] || sizes[:default]
      end
Return the width of tenon_content for this piece, or the :default size