Here's how I built my Pallet Table Set:
I built the table to the following dimensions: height 75 cm, width 60 cm, and length of 80 cm. I sanded the boards down but left any "live-edges" and rustic character intact. I assembled the table sub-frame by making a rectangle from deck boards. I then used eight deck boards butt-joined to form the legs and attached them to the table sub-frame. I reinforced the legs with some cross-braces made from more deck boards.
Finishing off my Pallet Table Set:
I made two stools from the rest of the boards. The dimensions of the stools are 50 x 40 x 40 cm. I built the frame similar to the table but used more cross-bracing to form another square around the outside of the legs for more stability.
I used marine varnish to seal the table and chairs.