The most frustrating moment in online shopping: you find the item, but your size is "sold out". Most people refresh for a few days and give up. Yet many sold-out sizes come back; the trick is catching that moment.
Why do sold-out sizes come back?
- Returns: returned items go back on sale at any time of day.
- New shipments: stores restock best-sellers.
- Store transfers: stock from physical stores can move online.
- Cancelled orders: unpaid orders return to stock shortly after.
When does a size come back?
There's no set time. Returned and cancelled sizes reappear at random and often sell out again within minutes.
How to track stock
- Manual checks: free but tiring, and usually too late.
- The store's "notify me": not available for every item and size, and can be slow.
- A stock tracker app: checks for you and alerts you instantly. The fastest way.
Mastook step by step
- Copy the product link from the store's app or website.
- In Mastook, tap "+" and paste the link.
- Pick the size and colour you're waiting for.
- Get an alert when it's back, "coming soon" or cheaper; tap it to open the product in the store's app.
Supported stores
Zara, Massimo Dutti, Bershka, Stradivarius, Oysho, Pull&Bear, Lefties, Mango, Beymen, Vakko, Vakkorama, Nike, Puma, Koton, Lacoste, Converse, Pierre Cardin, U.S. Polo Assn., Superstep, Sneaks Up, Gap, Madame Coco, The North Face, Deichmann, Colin's, Loft and Penti. H&M and Boyner coming soon.
Store guides: Zara, Bershka, Mango, Stradivarius, Pull&Bear, Massimo Dutti, Nike, Beymen.
5 tips to catch your size
- Track more than one size (waiting for M? add S too).
- Track colours separately; each has its own stock.
- Keep notifications on; a muted alert is a late alert.
- Stay signed in to the store's app so checkout takes seconds.
- For items that sell out in minutes, faster checks (Premium+: every 30 seconds) make the difference.
Frequently asked questions
Will a sold-out item definitely come back?
Not always, but many do through returns and new shipments. Tracking makes sure you don't miss it.
Is a stock tracker app free?
With Mastook's free plan you can track 3 products checked every 5 minutes. Premium plans offer more products and faster checks.
