We had two SUPs and one two-person kayak for our party of ten on a sunsail 444 cat. Plenty of room to Stowe along rails. Slight adjmentment at night to open hatches. We had six kids ages 8-16 who used the toys daily. We opted for the beginner SUP boards, knowing they would be used more for a swim toy for the kids. They had a ball, one paddling while two rode along. Teathered off to the dinghy davits when not in use during the day. Enjoy.