At first, the brief was to provide a logo for Efficient Foundations that gave the impression of jigsaw pieces; EF help small businesses to streamline processes and overcome administration issues, so the jigsaw theme seemed apt. Putting things squarely ‘outside the box’ is something we like to do at Sixes and Sevens and so rather than just use traditiona jigsaw pieces, we just slotted the two letters E and F together and rendered it so as to appear 3d, creating one of our favourite logo designs to date.