What are the dimensions of GW's large oval base?

[Condottiere]

What are the dimensions of GW's large oval base? Is it larger than the 60mm round?

http://www.games-workshop.com/gws/catalog/productDetail.jsp?prodId=prod1570012

[Vermis]

I think it's about the same as Renedra's oval bases - 115 x 88mm?

Could be completely wrong tho.

[Condottiere]

I think it's about the same as Renedra's oval bases - 115 x 88mm?

Could be completely wrong tho.

You might be right...

As long as the oval is bigger than 50mm, it'll be okay, but can't tell from the GW picture. I purchased a Dirz Wyrm and it's supposed to come with a round and square 50mm base, but the box contains an 80mm round. I don't like the "step-pyramid" style bevel and since 50mm isn't large enough, maybe 10mm more would be a better option? The oval might be the right size or might be too big for the figure which is "23cm from its snout to the tip of its tail and has a 21cm wing span." Pic from CMoN with a ~30mm tall figure.
     

[Vermis]

As long as the oval is bigger than 50mm

Ah, don't worry about that. It's bigger than their 60mm base. Google for pics of a tyranid carnifex or IG weapon team (60mm) beside a trygon or valkyrie (oval).
Googling for the dimensions of the oval base gives a couple of different results, but slightly bigger than the Renedra base anyway. About 95 x 120mm.