Start from density, not length
Fine, low-density hair typically carries 80–120g. Medium density sits around 120–180g. Thick or long hair goes past 200g and often needs a second row or additional strands at the perimeter.
Length multiplies weight: the same coverage at 22 inches needs meaningfully more grams than at 16 inches, because each strand is longer, not because you are adding strands.
By method
Genius Wefts and hand-tied rows: plan per row and per head circumference, then add a margin for cutting and sealing waste on wefts. K-Tips: plan per strand count and bond size, with the perimeter and part line requiring finer bonds.
Blended installs — a wefted mid-section with K-Tips at the hairline — are common in the USA and depend on both formats matching in shade, which is far easier when both come off one factory.
Order for the cycle, not the appointment
An install is not one purchase. It is the install, a refresh at some point in the cycle, and eventually a replacement. Ordering your core shades in a quantity that covers a cycle avoids the small, expensive top-up order.
Our 300g per shade (1kg total) minimum is set close to a single full install precisely so a stylist can buy at factory pricing per client rather than per warehouse.
Record the lot so the refresh matches
Write the lot reference into the client's file with the shade code. When she comes back in nine months, the refresh is matched to the batch she approved rather than to whatever is currently in stock.
This is ordinary manufacturing discipline and it is the difference between a client who stays for years and a colour correction you perform for free.
Buyer Questions
How many grams for a full head?
Most full installs land between 100g and 200g depending on density and length; assess in person rather than from a photo.
Can I order 500g and split it across clients?
Yes — 300g per shade (1kg total) is roughly one full install, and many stylists split it across two lighter installs.
How do I make sure a reorder matches?
Keep the lot reference and the shade code from the original packet and quote both when reordering.