Abstract: The present invention teaches that an improved shoe insert may be made in a smaller size and of a material which is firmer and more resilient, yet flexible than in prior art devices. An advantageous trapezoidal planform is also taught, in which the rear edge is shorter than the parallel front edge. The device may have a rear edge having a thickness of a few millimeters (up to ? inch) while the thickness of the device decreases regularly to the front edge, at which point the thickness reaches zero. The size of the device may advantageously be in the range from 1 inch in rear length to 1.5 inches in rear length, 1.25 inch in front length to 1.75 inch in front length, and from 1 inch in width (defined as the distance separating the parallel rear and front edges) to 1.25 inches in width.