Looking at the three hexagonal shelves in the photo, can you tell which one is 15 times the price of one of the others? The cheapest of the trio costs £10, the most expensive comes in at £150. The intermediate one is £77.74 for three – around £25.91 each.

Most of us would rather have 15 of the cheapest ones than just the single costly one. Thanks to their hexagonal shape, they can be used in a modular fashion, arranged to fit to the shape of the space on your wall.

1. Danish copper hexagonal shelf by The Forest & Co: £150, Notonthehighstreet
2. Form oak effect hexagon shelf: £10, B&Q
3. Minimalist geometric shelves – set of 3: £77.74, Etsy