Metric Ruler 801130cm 800150cm 800560cm H800560cm Ruler with holes 8020B20cm 8030B30cm 8050B50cm 8060B60cm 800250cm 800350cm 800450cm 800630cm 800750cm 8008B50cm 8009B50cm Imperial Ruler 808518'' 824824'' B506'' B6012'' B7012'' B8015'' Metric & Imperial 809545cm & 18'' 809760cm & 24'' H809760cm & 24'' Ruler with holes B5515cm & 6'' B5620cm & 8'' B6530cm & 12'' B6630cm & 12'' B6740cm & 16'' B7530cm & 12''