What's the best sized tank?

[Homunculus]

I own two Chinese Dwarf hamsters, and i'm looking to upgrade to a bigger tank :P what is the best size for them? and what is the minumium?

[StuCil]

I believe the minimum size is 70x40 cm. And for any additional ham you should add another 10cm squared. I could be wrong so, CMIIW

[Kissa]

Firstly, are these Chinese housed together? Are they male or female? While pet shops still sell them in pairs, it's generally best to treat female Chinese as solitary. I have heard of male pairs succeeding, but again most people will advise you keep them solitary too.

Secondly, I am assuming you are in the US? I wouldn't advise going smaller than a 20 gallon long tank (30x12 inches, about 75x30 cm) for a single dwarf or Chinese, and personally would rather use something with a bit more floorspace, like a 3ft tank (36x12 inches, about 90x30 cm). If you can get ahold of one in the Pecto or Petsmart (I can't remember which it is!) $-per-gallon sale, a 30 or 40 gallon breeder (36x18 inches, either 12 or 16 inches tall) makes an awesome hamster habitat for any species