The maximum dimensions allowed are different from the standard Chronopost delivery service. When it comes to the Chrono Relais service, the maximum width must not exceed 250cm. Equally, the total W+2H+2L and the length must not exceed 100cm.
Chrono Relais services cannot handle packages weighing more than 20 kg, unlike the Chronopost Express where parcels must not exceed 30 kg.