Auxiliary shield on Trajan\'s column

[jvrjenivs]

Some of the TC clipeii seem to be very small, some are larger. What would be a good size to make a reproduction of one of average size. Seems to me a reasonable guess might be about 28" x 44" (71cm x 112cm), or 24" x 40" (61cm x 102cm). It's sort of hard to make that guess, based on unknown sizes of the soldiers depicted, and whether the proportions of the shield to soldier are correct anyway. If those numbers are not "average", what might be a good size? The people carrying these shields will be about six feet tall. (183cm)

The leather shield cover found at Valkenburg (Netherlands) suggest a clipeus of about 1200mm x 600mm