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Read products, variants, inventory, and recent order demand through read-only access.
Shopify size inventory monitoring for apparel & footwear
Catch broken size runs before high-demand sizes disappear.
SizeGuard combines Shopify size-level inventory with recent demand to show when a product is technically in stock but the sizes that matter most are running out.
Available on Shopify · Read-only access · No inventory writes
The Shopify inventory blind spot
“In stock” does not mean your useful size assortment is healthy.
A style can still have plenty of units overall while core sizes are unavailable. For apparel and footwear merchants, product-level inventory can hide size-level stockouts, fragmented size runs, and replenishment risk. SizeGuard watches the size mix instead of relying on total units alone.
Measure demand by size
Evaluate each size against its recent demand share, current availability, and days of cover.
Detect broken size runs
Surface products where the remaining inventory no longer matches the sizes customers buy most.
Get actionable alerts
Receive deduplicated email alerts with critical sizes and reorder-oriented guidance.
Built for Shopify apparel & footwear teams
Size-level inventory signals without another giant dashboard.
- Broken size-run detection
- High-demand size stockout alerts
- 60-day demand weighting
- Size + color run monitoring
- Days-of-cover context
- Read-only Shopify permissions
- Automatic daily monitoring
- No customer identity displayed
Common Shopify inventory questions
What merchants actually need to know about size-level stock.
SizeGuard is designed for the gap between “How many units do I have?” and “Do I still have the sizes customers actually want?” That matters for shoes, apparel, activewear, uniforms, intimates, and other products where inventory is split across many size and color variants.
How do I find broken size runs in Shopify?
Compare size-level availability with recent demand by size. SizeGuard automates this check daily.
Why does a product still show “in stock”?
Edge sizes can remain available even after high-demand core sizes are gone, so the style stays purchasable.
Can SizeGuard change my inventory?
No. SizeGuard is read-only and does not write inventory quantities or create purchase orders.
Who is SizeGuard for?
Shopify apparel, footwear, and other merchants with meaningful size, color, width, or length variants.
Try SizeGuard
Install now, or let us check one size run for you first.
SizeGuard is live on the Shopify App Store. If you are not ready to install, send us your store and we will review one public size-based product as a free, no-obligation size-run check.
Already installed? Open Shopify admin.
Request a free size-run check
Send your store details. No Shopify credentials or payment required.