Arrange in increasing order of size. m, cm, dm, mm mm, cm, dm, m dm, cm, mm, m dm, mm, cm, m mm, dm, cm, m

From given options:

Meter (m) is the largest in size

1 Decimeter (dm) = 1/10 of a meter = 0.1 m

1 Centimeter (cm) = 1/100 of a meter = 0.01 m

1 Millimeter (mm) = 1/1000 of a meter = 0.001 m

Therefore the increasing order of size would be:

mm < cm < dm < m