Stock planning for Shopify clothing brands

Know what to reorder, in which sizes, and when.

Every morning you get a plan from your own Shopify sales that says what to order from each supplier and by when, with the reason next to each number. We set it up for you.

Calculate your lost sales Open the live demo
  • Free for 30 days
  • No card details
  • Read-only access
  • We set it up
Free check · your store

The sales your sold-out sizes may be missing

Paste your store’s web address to count the sizes sold out on full-price styles you still sell. If we messaged you about sold-out sizes, the list came from your public product pages, the same pages this check reads.

This check needs JavaScript. Email us your store’s web address at jackparry@redprintstudios.com and we’ll send you the list of sizes sold out instead.

£

Clothing and shoes with sizes, at full price: leave out accessories, gift cards and sale items. A rough figure is fine, and it stays in your browser.

30 days

From placing an order to the stock arriving.

Sales you may miss before a reorder arrives

Add your monthly sales to see the estimate.

over a 30-day lead time

At today’s rate, about a month

Set up a free stock plan for my store

or copy our address: jackparry@redprintstudios.com

Free for 30 days. Nothing to pay and no card details, and setup takes about an hour of your time. The button opens an email to us with your store filled in.

How this is worked out

monthly sales of full-price sized styles × share of their sizes sold out × 40%

A day is the monthly figure × 12 ÷ 365. “Before a reorder arrives” is the same daily figure over your lead time, not an extra loss. The item count divides the monthly figure by the average price of a sold-out size.

Share of sizes sold out is read from your product pages today: sizes sold out on full-price styles that still have other sizes in stock. Styles sold out in every size and marked-down styles are left out, because they’re probably finished or being cleared. It’s a snapshot: a size that sold out this morning counts the same as one that’s been gone for months.

On 29 Oct 2026 we checked the public product pages of 20 clothing brands on our outreach list, picked partly because they had sizes sold out. On full-price styles, the median was 15.6% of sizes sold out.

40% is the share of shoppers who don’t buy something else from you when their size is gone. Two studies of real sales records found about 28%: Li et al. (2023), 217 single-brand footwear stores, where shoppers could try the next size; and Anderson, Fitzsimons and Simester (2006), a catalogue and website retailer that offered backorders. Shopper surveys put it higher: 43–49% in a worldwide study (Gruen, Corsten and Bharadwaj, 2002) and up to 65% among frustrated online shoppers (GT Nexus and YouGov, 2015, a survey paid for by a software company). Online, a sold-out button can’t offer the next size, so we use 40%, between the two.

It treats a sold-out size as selling about as well as your other sizes. It’s an estimate of sales, not profit, and not a promise of what a stock plan would win back.

01The demo

How each number is worked out

Our live demo runs on Sample Brand Co., a sample clothing brand with simulated sales, and every number in it comes with its reason. Below, one size is worked through step by step: the Fleece Pullover in black, medium.

Sample Brand Co.300 products1,500 sizes3 suppliersdemo data

Open the live demo
Why these numbers · Fleece Pullover, BlackDemo data
2
Fleece Pullover Black
Northline Garments · order by Fri 23 Oct · lands Fri 13 Nov · lasts until the next order on Sun 13 Dec
Sales rising, about +37% over the next month
Units405
At cost£8,910
Protects£6,642
M
Topped up
Buy165
Lasts until Sun 15 Nov, after the delivery
29sold a week
174needed
10left on arrival
Black / M · buy 165
Sells
about 4 a day in stock (last 30 days; 13 sold-out days left out)
Plan expects
about 5 a day over the next 30 days, following its rising sales
Stock now
109 in stock
Runs out
around Sun 15 Nov
Lands
Fri 13 Nov if ordered Fri 23 Oct (Northline Garments takes 21 days)
Needed
about 174 to last until the next order lands, Sun 13 Dec
Left when it lands
about 10
Buy
165 (short by about 164, rounded to 5s)
Sales at risk
£2,948 in the next 30 days if not ordered

174 needed − 10 left = 164 short → buy 165 (rounded to 5s)

Fig. 02 — How the plan gets to 165 for Fleece Pullover, Black / MDemo data
See this card in the live demo →
How the 165 is worked out
What the plan shows

What to order now

Units per size for each style and colour, most urgent first, with the supplier, the date to order by and when it lands.

See it in the live demo →

What’s already on order

Orders you’ve already placed are counted before the plan suggests more, so it doesn’t ask you to buy stock that’s on its way. You list them when we set it up.

See it in the live demo →

Needs a check

Things to look at before you order: sizes selling far faster than usual, styles that come back a lot, and money sitting in stock with 6+ months’ cover or no sales in 90 days.

See it in the live demo →

02Who it’s for

Which brands it suits

Good fit

  • You reorder the same styles and sizes from your suppliers through the year.
  • You sell on Shopify.
  • Most of your online sales are sized clothing or shoes.

Not a fit yet

  • You buy each style once for a season and don’t reorder.
  • You make everything in house.

03How it works

Set up once, then a plan every morning

  1. Email us

    Send us your store’s web address and we’ll reply to find a time to set it up.

  2. Set it up together

    About an hour. You give the plan read-only access to your store and tell us your suppliers, how long each takes to deliver and what’s already on order.

  3. A plan every morning

    It’s worked out again each morning from your latest sales and stock, so it’s ready when you start.

  4. You decide

    Check the plan against how you’d normally buy, then place the orders you agree with.

Setup takes about an hour of your time, most of it listing suppliers and what’s already on order.

Jack ParryFounder · Redprint Studios

Who you’ll work with

Jack, our founder, sets up each store with you.

He’s based in Liverpool. Emails to jackparry@redprintstudios.com go straight to him.

04Your data

Read-only, and only what the plan needs

The plan works from your products, stock and sales. That’s all it reads from your store.

Your store and your dataRead-only
Store access
Read-only. The plan can see products, stock and sales, but it can’t edit a price, a product or an order.
What it reads
What sold, in which size, and when. Shopify’s install screen lists orders, because that’s where sales come from. The plan reads what sold and how many, not who bought it.
Never asks for
Customer names, emails or addresses. Shopify keeps those behind a separate permission that we don’t request.
Shared or sold
Never. We use your data only to build your plan, and we never sell or share it.
When you stop
We delete your data within 30 days, sooner if you ask. You can also remove the plan’s access from your Shopify admin at any time.

05Questions

The questions brands usually ask

If yours isn’t here, email us at jackparry@redprintstudios.com.

I’ve seen my result. What now?

Email us your store’s web address and we’ll find a time to set it up with you. For 30 days the plan runs alongside how you buy now, for free, and you compare the two. The free check only reads what your website shows anyone; the plan works from your own sales and stock, size by size.

I already plan in a spreadsheet or an app.

You don’t have to stop. For the 30 days the plan runs alongside however you buy now, and you compare the two. One thing worth checking in your own sheet: when a size has been sold out for part of the month, last month’s sales make it look slower than it is. The plan only counts the days each size was actually on sale, so it doesn’t under-order your best sizes.

What happens after 30 days?

You tell us whether it helped. If you’d like to keep it, we’ll tell you the monthly price before the 30 days are up and you decide then. If not, we delete your data within 30 days. We don’t take card details for the trial, so nothing renews by itself.

How much of my time does it take?

About an hour to set up, most of it listing your suppliers and what’s already on order. After that it’s reading the plan in the morning and letting us know when you place an order, so it knows that stock is on its way.

Who sets it up?

Jack, our founder, does the setup with you: see who you’ll work with above.

Do you work with brands outside the UK?

Yes. The free trial is open to Shopify brands in the US, Canada, Australia, New Zealand and Europe as well as the UK. The plan runs on your store’s time zone and works in pounds, euros, and US, Canadian, Australian and New Zealand dollars. If your store sells in another currency, email us first and we’ll check.

How accurate is it at the start?

It reads your past Shopify sales when it’s connected. What it can’t see is which days a size was sold out before then, so for the first few weeks it estimates those from gaps in sales, and slow sizes are rougher. It gets more accurate every day it runs.

Does it handle factory minimums?

Quantities are rounded to the 5s and 10s factories make. Minimum order quantities aren’t built in yet, so we note yours at setup and check the plan against them by hand.

What if a size is sold out on purpose?

Sometimes a missing size is on purpose, like the end of a line. Our messages and the free check only read what your website shows anyone, so they can’t tell the difference: treat the list as sizes to look through. The free check also leaves out marked-down styles, which are often being cleared, so its count can be lower than the one in our message.

Is it a good fit for my brand?

It works best if you reorder the same styles from your suppliers through the year: see who it’s for above.

06Free for 30 days

Try it on your own store

We’ll set it up with you, you run it alongside how you buy now, and at the end you tell us honestly whether it helped. There’s nothing to pay and no commitment.

Email us to start Open the live demo

Opens your email app. Or copy our address: jackparry@redprintstudios.com

  1. Days 1–30Free on your own store
  2. Before day 30We tell you the monthly price
  3. ThenYou decide. No card taken, and nothing renews by itself.
Jack Parry, founderRedprint Studios. He built the first version for a clothing brand in Liverpool.
Demo data
The demo plan on a phone (demo data): 37 styles to order today, £138,288 of sales at risk, 206 sizes sold out, £11,098 in slow stock.