I’ve recently lost my Beats Solo 4, 4 days ago

during school i was in my 10th period i was talking to my friends and i sat my Beats Solo 4 next to me and we were just talking and after school ended i noticed that i didn’t have my beats so i ran back to my class and they weren’t there and i went to go look at the location in find my and they said they were last in the hallway which was odd because i left them in the class and ever since then i been trying to locate them but they haven’t been turned on or something cause it’s been 4 days and the location still haven’t changed so i was wondering how can i find them i still have my serial number I just want to know if there’s a way I can find them