A versatile label holder adapted to be stably secured in C-channels of various widths such as are found in Lozier, Madix and Streater shelves without significantly modifying the angle normally presented with each of these shelves. The label holder includes a rearwardly extending leg adapted to be captured by the lower lip of the C-channel, a portion of which is resilient and arcuate, extending first upwardly and then downwardly to provide a spring-like element, the effective length of which can vary depending on the spacing between the lips of the C-channel.