Circle, Oval, Triangle, Square, Rectangle, Kite, Semicircle, Rhombus, Trapezoid, Parallelogram, Pentagon, Hexagon, Octagon, Sphere, Pyramid, Cylinder, Cube, Cone, Obelisk, Torus, Cuboid, Ovoid, etc.

- Could be a word in a title
- A shape depicted on the cover
- A setting like The Pentagon, Egyptian pyramids, The Louvre, Trafalgar Square, Union Square, Tiananmen Square, Red Square, Times Square, Main Market Square, obelisk as a link to a monument such as Washington D.C.
- A topic such as a Love Triangle or Closed Circle Mystery
- A representation of the shape: a sphere could represent the earth or sun or planet or ball, or an octagon could represent a stop sign, an ovoid could be an egg, a cylinder could be a grain silo, torus could be a doughnut or toroidal spaceship, cuboid could be a raft or a building or book
- Shape-related places: a football or rugby field, baseball diamond, soccer pitch, drum circle, hockey rink
- Shapes comprised of other shapes: heart, wheel, cross, star, arrow, pentagram, ring, diamond, etc.