Choosing the right amount of hair is the most critical step in achieving a natural-looking extension install. Too little hair creates a ‘stringy’ appearance, while too much can cause unnecessary tension on your scalp. At Full Shine, we’ve analyzed over 10,00 professional salon installations to standardize our weight recommendations. Whether you are looking for subtle volume or a dramatic length transformation, our guide breaks down the exact gram requirements based on your natural hair density and desired end result. We don’t just sell hair; we provide the Gram-to-Volume standards used by stylists worldwide to ensure your extensions blend seamlessly every time.
The Full Shine Density Standard: Every pack of our weft hair is calibrated using a Gram-to-Volume Precision Scale. Unlike many brands that provide thinner ends to save weight, Full Shine maintains a consistent root-to-tip ratio. This means 100g of our hair provides more visible coverage than standard 100g packs. Our recommendations below are based on over 15 years of manufacturing data and feedback from our global professional network.
The Full Shine Standard: Understanding Pack Weights
At Full Shine, our standard Double Weft packs typically contain 100 grams of premium Remy human hair. Because the hair is sewn in two layers onto a single track, you get instant fullness.
- 100g (1 Pack): Ideal for adding a subtle “boost” of volume to hair that is already long.
- 200g (2 Packs): The industry standard for a full-head installation.
- 300g (3 Packs): Reserved for the ultimate “Glam” look or blending very thick, blunt natural hair.
Density Matching: Calculating Weight Based on Your Hair Type
Fine or Thin Hair: 100g to 150g for Natural Volume
If your natural hair is delicate, less is often more. Overloading fine hair with too many wefts can cause tension on the scalp. One pack (100g) is usually sufficient to add noticeable length and healthy-looking density without the bulk.
Medium Density Hair: 150g to 200g for Fullness
For most women with “average” thickness, 2 packs (200g) are the sweet spot. This ensures that the transition between your natural hair and the extensions is seamless, especially if you are adding 4 or more inches of length.
Thick or Blunt-Cut Hair: 200g to 300g for a Seamless Blend
Thick hair requires more weight to “hide” the natural ends. If you have a blunt bob or very dense hair, you will need 2.5 to 3 packs to prevent the “mullet effect”—where your natural hair sits like a shelf over the extensions.
Pro-Stylist Technical Insight: If you are transitioning from a blunt-cut bob to long extensions, you face the ‘step-line’ challenge. Our technicians recommend adding a 50g ‘Buffer Layer’ beyond the standard weight. This extra density is essential for masking the sharp horizontal line of a blunt cut, ensuring your natural hair ‘disappears’ into the extensions for a 100% natural blend.
The Length Factor: Why Extra Inches Require Extra Grams
It’s a common misconception that 24″ extensions will look as full as 14″ extensions of the same weight. As the length increases, the hair naturally tapers towards the ends. To maintain a thick, blunt finish from root to tip, we recommend:
- 14”–18”: 100g–150g for a natural look.
- 20”–24”+: 200g–250g to ensure the ends don’t look sparse or “stringy.”
Installation Strategy: Balancing Rows and Grams
With Double Wefts, you can achieve massive volume with fewer rows.
- One Row: Best for adding thickness to the back.
- Two Rows: The most common setup for a full-head transformation.
- Stacked Rows: For maximum impact, your stylist can “stack” two wefts on a single row. This concentrates the volume while keeping the rest of your scalp free and breathable.
Join the #FullShine Community: Still unsure? We’ve documented over 25,000 real-life transformations categorized by weight. Search #FullShine100g or #FullShine200g on Instagram and TikTok to see how different packs look on real people with your hair type. You can also upload a photo of your current hair to our Live Consultant Desk—our experts will analyze your density and provide a personalized pack recommendation within 24 hours.
Buyer’s Checklist: Finalizing Your Order
Adding Volume only? Get 1 Pack (100g).
Adding Length & Volume? Get 2 Packs (200g).
Short Hair to Long Hair? Get 2-3 Packs (200g+).
Large Head Size? Add an extra 50g just in case.
Written by Skyee, Senior Stylist at Full Shine Hair with 10+ years of extension experience. With over 12 years of hands-on experience in the professional hair industry, Skyee specializes in the application and maintenance of seamless hair systems. As a lead educator at Full Shine, she bridges the gap between salon-grade expertise and at-home care. Her “Support & Stroke” method has helped thousands of clients extend the lifespan of their ultra-thin PU wefts.
Verified by Full Shine Product Development Team: This weight guide is reviewed annually to align with current salon installation trends and our latest hair fiber innovations. Last Audit: 2026. This content is part of our Stylist Education Series, supporting over 1,200 salon partners worldwide.
