Connector terminal, connector, and size adjustment device

A connector terminal comprising:

• a tubular section having a tubular body surrounding a central axis and a lance formed by cutting a part of the tubular body and angling the cut part about its base part away from the tubular body,
• wherein the tubular section comprises a portion including a boundary between the tubular body and the lance, wherein the portion is curved to bulge outward as seen from a direction of the central axis, and
• wherein the lance has a pair of end edges opposed to each other in a width direction orthogonal to the central axis, and at least one of the pair of end edges at least on the side of the base part of the lance is formed to taper toward an opposite one of the pair of end edges as the at least one tapered end edge advances toward a leading end of the lance;
• wherein the lance has a trapezoid portion and a rectangle portion extending from the trapezoid portion.