Size and colour are stock, not a note
Short answer
Variants carry their own barcode, SKU, price and stock. A listing maps to the variant, not to the parent — otherwise selling a medium would reduce the stock of a large.
muhasebe.cirometre.com/products
Products312 products · 86 variants · 5 catalogues
CataloguesTags + New product
AllStock trackedWith variantsBundlesServices
Catalogue: all
312 products Product Catalogue Variants Sale price Cost VAT Type
Crew Neck T-ShirtTX-1042 · Apparel
Duvet Cover SetHM-2031 · Home textile
Gift Set (3 items)ST-5002 · Bundle
Shipping serviceSRV-0001 · Service
The variant is the thing that ships
Tracking stock at parent level is simpler right up to the first oversell, which always happens on the size that sells fastest.
Each variant is a stock item with its own barcode, so the warehouse and the channel are talking about the same object.
Frequently asked questions
Does each variant have its own stock?
Yes, with its own SKU and barcode. Channel listings map to the variant.
Can variants have different prices?
Yes — a larger pack size can carry its own price without being a separate product.