Sell different sizes or packs from one shared stock pool. Set how much each size uses and see what every size can sell. Shopify reserves the shared stock at checkout, so a sale of one size updates all of them. Hold stock back, record deliveries and corrections with a reason, and read a history of every change. Add or remove sizes any time, or turn shared stock off. For Online Store, Shop and POS sales at one location with tracked stock. No subscriptions or exchanges.

• Sell several sizes or packs from one shared stock pool.
• See what each size can sell now, with every sale reflected in all sizes.
• Hold stock back so customers never see it as available.
• Add, remove or correct stock with a recorded reason and a full history.
• Add or remove sizes any time, or turn shared stock off and keep selling.