CutSizeGenie is a Shopify app for fashion and apparel e-commerce brands that unlocks revenue from out-of-stock sizes using virtual inventory and size mapping. It improves size availability on Shopify product pages without theme edits.
Solutions

Out-of-stock sizes on Shopify are silently killing conversions.

In fashion, customers don’t buy “the product” — they buy their size. When key sizes show sold out on PDP, your paid traffic leaks and your PDP conversion rate drops.

Install CutSizeGenie → See Taruni case study Compare with stock alert apps

Why sizes go out of stock (even when your warehouse isn’t “empty”)

You stock jump sizes deeper
Many brands stock M/XL deeper, while S/L are low. PDP then shows sold-out sizes even though nearby sizes exist.
Demand is not evenly distributed
One or two “hero sizes” sell faster due to demographics and trends, causing faster size-level stockouts.
Replenishment cycles are slow
Manufacturing lead times make it difficult to restock sizes quickly, especially during festive peaks.
Alterations exist but Shopify can’t “understand” them
Operations can often fulfil S from M (or L from XL), but Shopify sees them as different variants with separate inventory.

The 4 solution paths (choose what fits your brand)

Solution A — Restock & demand capture
Use planning + back-in-stock notifications to convert customers later. Great when you truly cannot fulfil via alterations.
See comparison →
Solution B — Virtual inventory + size mapping (fashion advantage)
If you can alter/cut-size, convert demand now by borrowing stock from a mapped size within safe limits.
Jump sizes strategy →
Solution C — Improve operations workflow
Standardize how virtual orders are picked, altered, and shipped so the warehouse stays confident.
Alteration workflow →
Solution D — Use safety thresholds
Thresholds and caps prevent aggressive sharing and keep promises realistic.
Thresholds guide →

How CutSizeGenie fixes out-of-stock sizes (in simple terms)

  1. You define mapping like S → M and L → XL for eligible products/collections.
  2. When S hits 0, CutSizeGenie checks M stock and safety rules.
  3. If safe, it pushes limited virtual stock to S so PDP shows it available.
  4. When S sells, the real inventory is consumed from M and logged for operations.

Want to recover sales from sold-out sizes?

If your brand supports tailoring/cut-size workflows, CutSizeGenie can turn jump sizes into a revenue recovery layer.

Install from Shopify → Read Guides FAQ
Solutions
Related pages
Alteration workflow Jump sizes strategy Inventory thresholds Compare
Install → Glossary
Out of stock sizes on Shopify solution page. Explains why out-of-stock sizes reduce PDP conversion rate and ROAS for fashion brands. Presents solutions including virtual inventory, size mapping, jump sizes strategy, alteration workflow, and safety thresholds. Promotes CutSizeGenie Shopify app for fashion and apparel size-led inventory recovery.