Abstract: Method, arrangement and system for enabling comparison of product items. The method comprises retrieving measurements of a first product item, selected by a user to be a reference product item; and further retrieving measurements of a second product item, which is to be evaluated. The measurements of the first product item are compared with the measurements of the second product item; and an indication of the correspondence of the measurements of the first product item and the measurements of the second product item is provided to a user of a terminal, thus enabling evaluation of the size of said second product item in relation to the size of the first product item.