We realize not many woodworkers work in metric — at least not in the US — but we like the features on this layout square-like Japanese import from Shinwa. With its 2″ overhanging edge, the “3D” square lets you transfer lines from the face to the edge easily, plus it works with boards that have relieved or chamfered edges. The overhanging edge is also cut at an angle so the tip of your pencil lead contacts the workpiece without having to angle the pencil.
Made from aluminum with a brushed finish, the square’s 45° wing measures about 6″ wide at its widest point and the overhanging edge is about 4″ wide. The “3D” square’s shape probably precludes you from carrying it in your pouch, but it could come in handy around the workshop.
You can purchase this square for about $20.