Would these be suitable for school events? They were longer than I expected, so they are new and unused. They are unused, but there is no bag. I'm also a little unclear on the size, but I bought them when my child was in their final year of kindergarten, so I think they're around 19-21cm. They've been stored at home in a garment case for about a year. I would appreciate it if you could understand that these are used items. Thank you for looking.