Questions about SizeBack: stores, speed, price history, privacy

The basics

Which stores does it work on?: Most brands that run their shop on Shopify, which includes thousands of small clothing, shoe and kids' brands. Paste a link and we tell you right away whether we can read it.
What if the store isn't on Shopify?: We'll say so straight away and won't charge you for it. Some stores block automated checks; we tell you when that happens, and pause the watch so you're not waiting for nothing.
How fast will I hear?: Paid plans check your watches about every 10 minutes; during the trial you get the same speed. The free watch is checked about every 3 hours.
Can it guarantee I get the item?: No. We tell you when your size shows as available; restocks can sell out fast, so tap the link in the email quickly.
Do you buy anything for me?: No. We only watch and email you. You buy on the brand's own site.
How do I cancel?: One click in your account, any time. No questions.
How long does a watch last?: 90 days. Then we pause it and email you; one tap re-arms it if you're still hunting.

Price history on every watch

Every check records the price and stock of each size you watch. Your watch shows a small chart of the price over time, with its low and high, so you can tell a real drop from the usual price. On the plan you can also set a target price and we email you when it's reached.

Where the data comes from

Shopify stores publish a public product feed for every product page: its sizes, colors, prices and whether each one is available. SizeBack reads that feed from the store itself, only for products someone asked to watch, a few times an hour at most, one product at a time per store. Stock and prices always come from the store's own feed, never from a guess.

Our checker names itself as SizeBackBot, follows each store's robots.txt and slows down when a store asks it to. We never copy a brand's descriptions or photos beyond a thumbnail that links back to them.

Run a store and want us to stop? Email hello@sizeback.thetowers.ai with your domain and we'll stop checking it.

21%

of watched items came back in stock within two weeks on one alert site (backinstockalerts.com).

50 of 68

US-facing brand stores served their public product feed in an October 2026 test (dev.to).

162

stores is the whole list one popular restock tracker covers (restockalert.me). SizeBack isn't limited to a list.

Who it's for

Shoppers who buy clothes and shoes from small online brands and keep missing their size, and parents chasing the next size up for growing kids. Many small brands have no "notify me" button, or only email when a planned restock lands. Returns and quiet restocks come back one size at a time and sell out again before you think to check. That's the gap SizeBack fills.