Hello there,
The wing span is about 8-3/4 inches tip to tip (note there is a bit of upward "furl" there).
Beak to furthest flame-trail is 7-1/2 inches.
Overall height is about 1-1/2 inches.
The above are just for the model. Add another almost 4" from bottom of base to tip of where the base inserts in the model.
One note... if you're planning out foam, the phoenix doesn't snugly fit into the flight base ball with the socket on the model. YOu can angle it so it will stayput without greenstuff or filler in the socket, i found with mine with some careful trimming and fitting during the building of the model, a 45 degree angle will keep it in place. If you want the phoenix parrallel to its base, you'll probably have to take additional measures. I strongly suggest keeping the model and the base separate for storage purposes. It's just about impossible to store in a game bag otherwise.
Just a head's up. I have no idea why you wanted dimensions.

Hope this helps.
-- Haight