Congrats on getting the 360IBL. We love ours. Can't help you out with the size of the sheets because we pulled out the bunks and made it my scrapbook room. Hope another 360IBL owner will chime in with the info you need. PLEASE post pics...great to see another IBLer on the forums!
2015 Coachmen Chaparral 360 IBL
2014 Ram 3500 Turbo Diesel 6.7 4wd Crew Cab Dually