Abstract: The invention enables reducing of the complexity of Service Guide size management related to the management of the bandwidth occupied by a combination of streams comprising audio/and or video streams, signaling streams and service guide streams. The invention relates more particularly to a method of management of metadata size of a service guide, by devices part of a contribution network, and comprises a step of determination of a maximum size of the service guide metadata as a function of a protocol encapsulator fill level, a step of sending of a message containing the maximum size for the service guide metadata to a service guide server, and a step of delivery by said service guide server of service guide metadata to the protocol encapsulator where the size of the said service guide metadata is smaller than or equal to said maximum size.