Match colour, density and wave separately
Use physical references and a written specification instead of one screen photograph.

A convincing match is a set of decisions, not a single colour code. Separate shade, grey proportion, fullness and wave in your notes. Ask the fitter which existing hair should be used as the reference, especially if the sides and back differ. Bring your preferred style and explain whether you want continuity with your current appearance or a deliberate change.
HairBro's Color Ring and LaVivid's Hair System Color Chart provide physical hair samples. Use the relevant supplier's chart rather than assuming that an identical number names an identical shade elsewhere. Compare the agreed reference under consistent lighting, then record the supplier, code and any grey specification. A phone image can document the discussion but should not be the only approval record.
Density needs a separate conversation. Sanders is listed at 80%, but that number alone does not describe how every other brand measures fullness or how a finished haircut will appear. Ask for the seller's interpretation and discuss the transition into your remaining hair. Avoid choosing the largest number simply because more hair sounds like more value.
LaVivid also offers a Curl and Wave Chart. Use a physical pattern reference to discuss the desired texture independently of colour. Before paying, request a single confirmation covering shade, grey content, density, wave and hair length. If the chosen combination is unavailable in stock, discuss the compromise explicitly rather than letting one option change silently.
Official references
Original editorial analysis of linked official specifications and resources, checked 12 September 2026. No hands-on testing or measured ranking; availability and policies require reconfirmation.
Illustrative official catalog photo supplied by the linked brand; not an editorial wear-test photograph.