What size should I select?

See below an outline of our sizes we offer to give you an idea of scale. We recommend between 10-15cm between each frame.  As a general rule 

A normal standard couch we suggest 695 x 515mm , 1000 x 700, 1189 x 740mm sizes. 
Small nooks and entry 695 x 515m, 520 x 420 mm