Yes. Buyers, suppliers, and inspectors should approve one reference sample before bulk production, covering hair quality, texture, length, color, installation loop, packaging, and branding.
No tolerance is specified; 14–30 inches are available lengths, not bundle variation. Confirm the measurement method and acceptable limits with the supplier.
Review hair attributes, lace and cap details, and packaging in parallel, then consolidate approvals. The listed 15–30 days is general order guidance, not a sample timeline.
