The width of the long faces at the bottom of the lowest fragment is 31 cm ( 12 in ) , with a depth of 18 cm ( 7.1 in ) .
The whole cross would originally have been up to 3 metres ( 9.8 ft ) high .
The width of the long faces at the bottom of the lowest fragment is 31 cm ( 12 in ) , with a depth of 18 cm ( 7.1 in ) , and the whole cross would originally have been up to 3 metres ( 9.8 ft ) high .