I thought Tomas was asking for the overall width of the handlebars, maybe the prospective buyer has to get the bike down a side passage or has some other access problem.
But it’s not as simple as it sounds as on my GV 650 the handlebars are 34 inches wide but the brake levers poke out further making it more 36 inches wide. However if it is just a doorway I could get through a smaller width by turning the handlebars and tipping the bike a bit.