Request a dimensioned specification for each size, including nail width at the widest point and, where relevant, length and curvature. Confirm the measurement method and units, then measure samples consistently with a suitable gauge or caliper. Do not assume that a numbered size has the same dimensions across suppliers; sizing systems and molds can differ. Check the complete size assortment against the target customer and the intended pack count. A well-documented size chart and approved physical sample give purchasing, quality, and production teams a common reference. Also agree how much dimensional variation is acceptable before production, rather than deciding after bulk goods arrive.

First establish whether the set uses adhesive tabs, liquid nail glue, or both; these are different application systems and should not share unsupported wear claims. For tabs, review the adhesive dimensions, backing and release liners, application instructions, and compatibility with the nail underside. Test samples using a documented procedure that controls nail preparation, application pressure, and the conditions and duration of wear. Record lifting, slipping, residue, and removal experience across more than one user or trial, where practical. Results from a small buyer trial are not a universal wear guarantee. Ask the supplier to substantiate any duration or water-resistance claim with evidence relevant to the exact product and instructions.

Inspect for cracks, chips, sharp or rough edges, warping, uneven thickness, visible bubbles or inclusions, inconsistent shape, and finish defects such as streaking, patchy color, or incomplete coating. Check that the nails are clean and that decorations, if present, are securely attached. Verify the correct size mix, accessory count, adhesive-tab quantity, and packaging against the approved specification. A documented inspection plan should define the defect categories, sample selection, acceptance limits, and disposition of nonconforming units. ISO 2859-1 describes sampling procedures for inspection by attributes; citing the standard does not mean a supplier is certified, and buyers still need to agree the applicable sampling plan and acceptance criteria.

Assess representative sizes across the full set, not only the largest or most visually appealing nails. Compare the nail’s sidewall curvature, cuticle-end shape, width, and length with a range of intended users, and note gaps, pressure points, overhang, or a mismatch with the natural nail. Try the fit dry before applying adhesive, then evaluate the application and removal process using the product’s actual instructions. Include users whose nail beds reflect the target market rather than relying on one staff member. Record which sizes were selected and any fit issues, then compare results with the supplier’s size chart and approved sample. Shape names alone do not establish consistent dimensions or fit.

Keep a dated, identified approval sample and a written specification covering dimensions, shape, finish, color reference, decorations, size mix, accessory count, and packaging. When bulk goods are ready, inspect samples drawn from multiple cartons or production positions, not just a hand-selected presentation set. Compare them under consistent lighting and measurement conditions, and record deviations with photographs and lot or carton identifiers. Agree in advance on inspection timing, sampling method, defect definitions, acceptance limits, and corrective-action steps. A sample approval is useful only when both parties can identify the exact version and the bulk inspection refers to the same criteria. If a specification changes, document the revision and approve a new reference.

Verify that the pack contains the stated nail count, sizes, adhesive components, and any tools or instructions included in the approved artwork. Check that product identity, directions, warnings, supplier or responsible-party details, and other required information match the rules for each destination market and the product’s actual contents. Requirements vary by jurisdiction and can change; confirm them with a qualified regulatory adviser or the relevant authority rather than copying another supplier’s label. Review print legibility, language versions, barcode data, seal integrity, and protection against damage or component loss during transport. If adhesive or glue is included, assess its own labeling and documentation requirements separately from those for the artificial nails.