Ah, yes. Clearly it's based on the 'ALIEN 3' Halcyon kit. So it can't be very big - unless the item in Ashleigh's photo has been scaled up somewhat.
That creature kit actually looks pretty good in that review, too. it's a damned sight better looking than Halcyon's first 'ALIEN' kit, their model of the Big Chap. Which is too much LOL and facepalm in equal measure.
-Windebieste.