Abstract: In a packaging and presentation device for a piece of jewelry or a timepiece, which comprises a support intended to receive said piece, according to a first configuration, the support is formed of a first module having a supporting surface of a first supporting length or, according to a second configuration, it results from the assembly of the first module with at least a second, complementary and removable module, the support according to this second configuration having a supporting surface of a second supporting length which is greater than the first one. Thus, the device, which is easy to manufacture and economical, allows an advantageous packaging and presentation of several types of pieces of jewelry or watches. The support and its multiple configurations in function of the number and the dimensions of the used modules allows the use of a single device for pieces of jewelry or watches of different sizes.