Last verified: March 2026

The Universal THC Symbol

Colorado was the first state to require a universal THC symbol — a diamond shape with "THC" — stamped on every serving unit of edible cannabis. This standard, born from the 2014 edibles crisis, has been adopted by nearly every state that subsequently legalized. When you see the diamond, you know it contains THC.

What's on Every Label

• THC content: Listed as total THC per serving and per package. For edibles, each serving contains a maximum of 10mg THC.
• CBD content: If the product contains meaningful CBD, it will be listed alongside THC.
• Serving size: Clear indication of what constitutes one serving (one gummy, one piece of chocolate, etc.).
• Total servings: Number of servings per package (maximum 10 for recreational, since the package max is 100mg).
• Metrc tracking number: The unique identifier linking the product to Colorado's seed-to-sale tracking system.
• Testing results: Confirmation that the batch has been tested for potency, pesticides, heavy metals, microbials, and residual solvents.
• Harvest/production date: When the product was harvested or manufactured.
• Ingredients: Full ingredient list for manufactured products.

Understanding Potency

THC percentages on flower labels typically range from 15–30%+. For context:

• 10–18% THC: Lower potency, good for beginners or those seeking milder effects
• 18–25% THC: Mid-range, suitable for regular consumers
• 25%+ THC: High potency, best for experienced consumers

Note that THC percentage alone does not determine the quality or character of the experience. Terpene profiles, growing conditions, and individual tolerance all play significant roles.

Packaging Standards

All Colorado cannabis products must be sold in packaging that is:

• Child-resistant — Meets CPSC standards for child-resistant packaging
• Opaque — Contents not visible from outside
• Resealable — For multi-serving products

Purchases must leave the dispensary in an opaque, child-resistant exit bag.