Sizing Gouramis

[a1wonder]

I'm planning for feature stocking in a week of a new 33 gal tank I was wondering how big some of these gouramis get:
Dwarf Gourami
Gold Gourami
Pearl Leeri Gourami
Thick-lipped Gourami

I currently have a
Blue Gourami 2.5inchs
3 spot Gourami 2.5 inchs

I found alot of the infromation online to be contradicting so I figure it best to ask the people that own them and compare answers that way