A set of photo frames.
4 frames: 7x10 cm (outer dimensions: 10.5x15 cm)
5 frames: 9x13 cm (outer dimensions: 13x18 cm)
4 frames: 10x15 cm (outer dimensions: 15x21 cm)
The frames were arranged in a diamond pattern on a plywood backing, secured with small nails. If this design works for you, it will save you from having to make multiple holes in your wall.
