Lookbook sizing

Existing look books don't show much variety of their sizing and dimensions. However, I feel that a look book needs to have fairly standard and widely used paper dimensions, because these after all do work for a great layout.

A very tall or very wide book would make it really hard for the customer to hold it.

The choice of either portrait, landscape or square enables the layout to be very versatile.

For my Harvey Nichols look book I will be choosing Landscape for my page orientation, I am still undecided on the page dimensions. 

Landscape

Square

Portrait