Sizo trains a model on your shop, forecasts demand and recommends what to do next, with the reasoning behind it.
Here’s what it costs fashion brands.
Size allocation
Up to 20%
of monthly profit is missed by fashion brands through poor size allocation.
Source: Kyndof ↗
Stockouts
55%
of shoppers won’t come back after repeated stockouts. 76% say stockouts hurt how they see the brand.
Source: Opensend ↗
Excess stock
Up to $140B
in excess stock across fashion in 2023: 2.5–5 billion items made beyond demand.
Source: BoF & McKinsey, The State of Fashion 2025 ↗It learns every product, shop, size and season, and how they connect, so every recommendation starts from what it already knows about your store.
It connects every product
to how it sells.
How much to order:
240 units.
And where
each one goes.
One brain that keeps
learning your shop.
Sizo answers from what it knows about your shop, and shows you why.
Good morning.
Revenue audit · last 12 months calculated Sep 29
$48,260
lost to wrong orders, across 31% of your catalog.
3 recommendations · most urgent first
Order today
To avoid a stockout
Rib-knit sweaterOat
240units
Regular
Est. sales at risk $7,040
Order within 3 days
To avoid a stockout
Linen shirtWhite
136units
Regular
Est. sales at risk $3,120
Order within 7 days
To avoid a stockout
Linen dressForest
56units
Regular
Est. sales at risk $2,480
Orders that came too late, too small or in the wrong sizes all cost sales. The audit shows how much, and how much you can win back.
$48,260
lost to wrong orders: too late, too small or in the wrong sizes.
Example store · by recoverable loss
Audit my store, free →Free · no card · read-only
Case study · Dé Rococo · Shopify Plus, multi-location
Read the case study →“Sizo does in seconds what used to take me and my employee a long time and pull us away from other work, saving us money on every single order.”
Shon & Romy Spector · Co-founders, Dé Rococo
Units sold, year before100
First year with Sizo165
Pick a question. The answers are short.
What does Sizo do?
Sizo
Sizo trains a model on how your store sells, by product, size, shop and season, forecasts demand and recommends what to order next: how much, in which sizes, and where each unit should go. Every recommendation comes with the reasoning behind it.
All questions
Sizo trains a model on how your store sells, by product, size, shop and season, forecasts demand and recommends what to order next: how much, in which sizes, and where each unit should go. Every recommendation comes with the reasoning behind it.
It looks at what each size really sold, how fast it sells in each shop and online, what is still in stock, returns, the season ahead and your supplier’s lead time and minimums. Then it suggests a quantity, with a lighter and a bolder option next to it.
No. Sizo drafts the order. You review it, change it and send it yourself. Nothing goes to a supplier without you.
Order history, line items by SKU and size, stock levels and returns, read-only through Shopify’s official API. Sizo doesn’t use or keep your customers’ names, emails, phone numbers or addresses; it keeps only an anonymous customer ID, to link a return to a later reorder. Shopify’s install screen lists customer data because its analytics API requires that permission for every app that uses it.
What wrong orders cost you over the last 12 months: sales missed because an order came too late or too small, and stock sold at markdown because the wrong sizes were bought. It ranks your biggest misses and shows how much you can win back.
Sizo reads your full sales history and, for most brands, the first recommendations arrive the same day.
Shopify today, in one click, read-only and with no dev work. Not on Shopify, or running several brands? We set up the connection with you.
Sizo focuses on restocks, where it can measure real demand. For a new drop, its size data from what your shop already sold helps you size the first order.
See the pricing page. You can start with the free audit, no card needed.
