A wearable band with an adjustable size or length. The band includes a first band element with a raised center or identification member. The band includes a second band element with a body having a loop or lasso at one end defined by an inner surface of a sidewall. The outer sidewall of the raised center member is detachably coupled to the inner surface of the loop-defining sidewall when the center member is received within and captured by the loop such as by a snap detent arrangement. To allow sizing, the second band element includes both an inner band sizing element including the loop-defining sidewall at one of its ends and an outer band sizing element that is detachably coupled to the inner band sizing element. The length of the second band element is defined by the combined length of the inner and outer band sizing elements.