measures

Length:                                                               Weight:

1 line                2,54 mm                                    1 grain =   0,0648 g          

1 inch (’)           2,54 cm                                     1 pound (lb, #)= 45,36 dkg

1 foot (láb)        30,48 cm

1 yard               91,44 cm

1 Zoll                2,54 cm

Diameter in inches in case of arrow shafts:

Arrow of 5/16:  5/16 x 2,54= 0,79, so 8 mm.