they'll hold up to about a 13" I think easily. Much larger than that and I think you'd be pushing it. However in my experience I've left cameras, ipads etc laying out and they didn't grow legs inside the room either.
Ours was big enough to put our IPad in there, but we did not take a laptop. Possibly call the resort and ask for the dimension opening. But I don't believe it is big enough for a laptop, sorry
Might be pushing it trying to get a laptop in there. We kept ours out on the desk, and put our cash, passports, cameras, jewelry and things like that in the safe. We didn't have any problems, and don't know of anyone who has.
We bring a laptop, 15 ''. Left it in the desk with our clothes, when need it just pull it out. never get prob ! Put passport, cash, camera, and all our private information in the safe
our laptop would not fit in.. it is a standard 15" HP laptop.. we left it in the travel case in the closet during the day and never had a problem..