What size cabinet for adult diamond?

[dalese]

I'm currently keeping an eye out for a cabinet or similar to covert for when my diamond grows up and was wondering what sort of size I should be aiming for?

 

[abnrmal91]

Minimum size would be 4ftx4ftx2ft. Bigger is always better.

 

[calebs92]

a 6x4x2 old tv cabinet would mean alot to your diamond and it will love you forever haha but ATLEAST 4x4x2