The RSPCA recommend the minimum size a permanent cage for a Syrian hamster should be is 75cm x 40cm x 40cm.
We don't currently stock any Hamster cages, but we strongly encourage you to purchase a cage which meets these minimum recommended sizes. The Ferplast Cricetti 15 is readily available on Amazon and provides enough floor space for your Hamster to run.
For the ultimate in space for yuor hamster, the Criceti 100 is also a great choice as it is 95cm long.