A saree has no size, which does not mean size is not a question. It has a length, a width, and a blouse piece — and for everything else in this category, a set of measurements and a margin.
Sarees
Length. Sarees are sold in different lengths, and the common ones differ by roughly the length of a blouse piece. A length that assumes an attached blouse piece is not the same as one that does not — ask which you are getting.
Width, which decides the drape and how much pleating you have to work with.
Blouse piece — attached, separate, or absent. And its own size if it is pre-stitched.
Petticoat is yours, not the seller's, but the saree length interacts with it.
Lehengas and stitched sets
Waist, length, flare, and the blouse measurements — bust, shoulder, sleeve, length.
And the question that decides whether any of it matters: how much seam allowance is left? A stitched piece with margin can be altered to fit; one without cannot.
Unstitched and semi-stitched
Say which. An unstitched set is fabric plus the work of a tailor, and a buyer who expected a finished garment has a real grievance.
What to ask the seller
"Length and width in metres, blouse piece attached or not, and how much allowance is left?" — all four in one message. Questions to ask.
What protection covers
Measurements materially wrong, a blouse piece listed and absent, a stitched piece described as unstitched or the reverse: seven days from delivery.
Questions people ask
Does a heavier saree need different measurements?
Same measurements, and ask the weight too — it changes the drape.
Can a blouse be let out?
Only with allowance. Ask before bidding.
Is a pre-stitched saree sized?
Yes, like a garment. Ask for waist and length.
More: buying sarees, what one is worth.