Disney cabins are some of the largest in the industry, or so I've read. Unlike other cruise lines, Disney designs thier cabins with families in mind. A family of four or even five should have no problem in a standard cabin.
I'ld Rather Be Cruisin'
Disney Magic February 4 2006
RCCL Freedom January 20 2008
Disney Wonder October 2009
RCCL Rhapsody of the Seas September 2011
Disney Magic February 2012
Disney Wonder January 2014
Disney Wonder to Hawaii 2015...I hope!