The opposite sides of a die cube always add up to 7.
In Japan, the word shi means "death". In some cases nana ('7' in early classical Japanese) replaces the word shichi ('7', in modern Japanese) because it contains shi.
7 ± 2 is a cognitive numeric limit (cf. 'The Magical Number Seven, Plus or Minus Two: Some Limits on Our Capacity for Processing Information' by the cognitive psychologist George A. Miller, The Psychological Review, 1956, vol. 63, pp. 81-97)
The number 7 symbolizes humanity's deep inner need to find depth, meaning, and spiritual connection.
|Number 7 (Seven) Black Cap
|Number 7 (Seven) Keepsake Box
|Number 7 (Seven) Tile Coaster
|Number 7 (Seven) Wall Clock
|Number 7 (Seven) Framed Tile
|Number 7 (Seven) Button
|Number 7 (Seven) Fitted T-Shirt
|Number 7 (Seven) Mug