you could have a look through this thread I did
UK Hamster Cages 2021
If you watch the short videos it includes all the measurements.
If you are up to building your own from IKEA then the Komplement cage looks really good- links are all in the cage thread.
As she is chewing, it could be a good idea to look out for a 2nd hand tank type cage, where you might have to build a lid.