Fit and finish decide this category, and most mistakes hide one of them.
Measuring stretch fabric stretched
Give the relaxed measurement and say the fabric stretches. A garment measured while pulled is a garment that will not fit.
Not turning the lining out
Linings fail before outer fabric does — tears at the armhole, a hem come away, discolouration. It is the first place a buyer looks.
Not saying how much seam allowance is left
For occasion and ethnic wear this decides whether a piece can be altered to fit, which decides whether somebody can buy it at all.
Photographing in warm indoor light
It flatters colour and hides marks, and a buyer sees both in daylight. Show it in daylight and say if screens differ.
Not counting missing stones
Count them, show them, price for them. Unmentioned, they are the first thing noticed.
Packing without tissue over the work
Beads, sequins, zari and hooks catch on whatever is folded against them, and a pulled thread is permanent. Packing womenswear.
Treating label size as information
It is a starting point. The measurements are the listing. Describing womenswear.
The one that costs most
Not saying whether the piece has been altered. It changes every other number you have given.
Questions people ask
Should I model the garment?
Only if you want to, and never instead of flat measurements.
Is a torn lining a deal-breaker?
No, and it must be declared.
Do occasion pieces sell better alone?
Yes, with time on camera for the fit questions.
More: selling womenswear, what it is worth.