Wooden mannequins are great for drawing quick poses, but they can’t hold all the poses you may want. The secret is to use them for lots of practice drawing so that you build a model of the mannequin inside your head. Then, with practice, you will be able to draw a pose from any angle.

Get a mannequin in the UK here: http://amzn.to/1m1XL94

and in the US: http://amzn.to/1prCciz