belt problems

Hi, there anyone can help, I just need to know the size for the national rx-cw55f belt, for both side Thanks

Hi, I just got a boombox I’ve been tinkering with working, but I got one last problem. The belt inside is too loose. Common problem, but the issue is that I can’t change it. It’s as deep into the thing as it can possibly be. I will never be able to change it without cutting cable to take it...

Ok, so actually it's a vz3000, but thought this was the best area to ask, seen quite a few in pics so know you guys have them too. Basic history, had this since new, had belts replaced in past, several years ago, about 18 months ago started to play fast and then slow, so bought new belt kits...