a decorated strip of coated , heat - shrinkable , plastic sheet material is placed on a mold comprising a cylindrical mold body , and attachment means , preferably in the form of two parallel pins extending toward the cylindrical mold body from a pin - supporting wall , and with their ends remote from the wall spaced a short distance from the cylindrical mold body . holes adjacent the ends of the strip are engaged with the pins . upon heating in an oven , the strip shrinks , forming a resiliently expansible finger ring , which can be removed from the mold by disengagement from the pins .