A sizing kit helps you try a tip shape before ordering a finished set. A replacement nail fills a gap in a set you already own. Both work best when the size information refers to the exact tip style you need.
Keep the original order details and a record of each finger’s confirmed size. That saves much of the guesswork when you need either service.
What a sizing kit tells you
Sample tips let you check width, cuticle outline, and curve on your own nails. Use them without adhesive unless the kit’s directions say otherwise. Try neighboring sizes and look from the fingertip end to see whether the shell rests comfortably.
A sample that only fits when you squeeze it into place deserves another look. A wider tip may cover the nail, but it can still have the wrong curve. Tell the seller which part fails to meet the natural nail instead of sending only “too big” or “too small.”
What a sizing kit cannot promise
Confirm whether the samples are the same shape, length, and tip family as the finished set. A kit for one style does not automatically establish your sizes for every other style.
A plain sample also cannot show every feature of a finished decoration. Raised details may affect how the nail catches on fabric or fits beneath gloves. Use the sample to assess fit and the finished product description to assess the design.
Keep a usable size record
Label left and right hands separately and list the fingers in a consistent order. Include the style name and any approved filing adjustment. A photograph of the arranged sample tips beside the record can help you remember which number belongs where.
Retest if you change style or if a previously comfortable tip no longer sits correctly. Do not treat an old number as more reliable than what you can see and feel during a current dry fit.
Requesting a replacement nail
Send the original order identifier, finger position, size code, shape, length, and design. For an asymmetric or hand-painted set, say which hand the missing nail belongs to. A left ring-finger design may be different from its right-hand partner.
Ask whether replacements are offered and how closely a new piece can match the original batch. Color, placement, or reflective effects may need a fresh reference. Keep the remaining nails clean and protected while you wait.
Decide whether one replacement makes sense
Compare its cost and delivery time with the condition of the rest of the set. A replacement is useful when the other tips remain suitable for wear under their care instructions. It cannot restore damaged adhesive surfaces or repair a cracked neighboring nail.
Keep an unused replacement labeled in its own compartment. Record the size after confirming it, then update the set inventory so you know what is actually available next time.