Coins are a traditional symbol of wealth and luck. The number of coins also has significance.

• Three — Attracts wealth as they represent the trinity of luck: heaven, earth and mankind
• Five — Invokes the five "Emperors of the Universe" to protect against danger and attract wealth. The five coins also signify the five feng shui elements (metal, wood, water, fire, and earth) for a balanced and harmonious life.
• Six — Believed to help with attaining skills in networking and gaining support from influential people in your workplace.
• Seven - Believed to attract wealth, prosperity and good fortune.
• Eight — Very auspicious since the number eight sounds like "good fortune” in Chinese. It's also linked to the symbol of infinity which represents unending good things.
• Nine — Signifies the wholeness of the universe, and the unity between heaven and earth
• Ten — Represents completion and perfection

Coin size: About 7/8 to 1 inch