"Musti is a big, Finnish dog."
Translation:Musti on iso suomalainen koira.
Well, you can say "suomalainen iso koira" as well, but it doesn't feel quite as natural. Short adjectives tend to come before long ones.
The order of adjectives is usually following:
Shape (big, small, round etc.): "iso koira" (big dog)
Age (old, young, new etc.): "iso vanha koira" (big old dog)
Colour: "iso vanha musta koira" (big old black dog)
Origin (Finnish, national, domestic etc.): "iso vanha musta suomalainen koira: (big old black Finnish dog)
- Matter (wooden etc.), but these usually compund with the noun
Since shorter adjectives come before long ones this order is not set in stone, however, and it is also preferred that more complex adjectives follow simple adjectives.