A system arranged for transferring by sublimation graphical images on objects wrapped by transfer supports, comprising - an horizontal oven comprising an inlet mouth and an outlet mouth and a belt for transporting said objects, - at least one suction unit located along at least one side of the oven, - a plurality of hooking/unhooking components located along the at least one side of the oven and configured for hooking/unhooking the objects wrapped by the transfer supports, - at least one catenary located along the at least one side of the oven and arranged to move said objects wrapped by the transfer supports from said inlet mouth to said outlet mouth by way of said hooking/unhooking components, - a separating wall arranged to keep separate a hot zone, wherein the oven is working and the hooking/unhooking components are provided, from a cold zone, wherein the oven is not working and the at least one the catenary and the at least one suction unit are provided, characterised in that it comprises - a handling device (25, 25a) arranged to move said at least one suction unit, said at least one catenary and said plurality of hooking/unhooking components transversally to said inlet mouth, to said outlet mouth, and to said belt of the oven whereby said separating wall keeps the hot zone separate from the cold zone as a function of the size of the objects wrapped by the transfer supports, and - at least one movable sheet, in a lower area of the oven, connected to the handling device and arranged to be moved by the handling device (25, 25a) so as to dimension the hot zone as a function of the size of the objects wrapped by the transfer supports, one or more pipes being provided to convey hot air to the lower area of the oven, below the belt arranged to transport the objects into the hot zone. - an horizontal oven comprising an inlet mouth and an outlet mouth and a belt for transporting said objects, - at least one suction unit located along at least one side of the oven, - a plurality of hooking/unhooking components located along the at least one side of the oven and configured for hooking/unhooking the objects wrapped by the transfer supports, - at least one catenary located along the at least one side of the oven and arranged to move said objects wrapped by the transfer supports from said inlet mouth to said outlet mouth by way of said hooking/unhooking components, - a separating wall arranged to keep separate a hot zone, wherein the oven is working and the hooking/unhooking components are provided, from a cold zone, wherein the oven is not working and the at least one the catenary and the at least one suction unit are provided, characterised in that it comprises - a handling device (25, 25a) arranged to move said at least one suction unit, said at least one catenary and said plurality of hooking/unhooking components transversally to said inlet mouth, to said outlet mouth, and to said belt of the oven whereby said separating wall keeps the hot zone separate from the cold zone as a function of the size of the objects wrapped by the transfer supports, and - at least one movable sheet, in a lower area of the oven, connected to the handling device and arranged to be moved by the handling device (25, 25a) so as to dimension the hot zone as a function of the size of the objects wrapped by the transfer supports, one or more pipes being provided to convey hot air to the lower area of the oven, below the belt arranged to transport the objects into the hot zone.