lalo-app
WYSLive stock in every row
In stock, only one left, preorder or sold out — for the model and color the shopper is looking at. Click a row to select the size.
Shopify app · size charts and size guides
Size charts that show what is in stock
Most size charts tell shoppers which size fits. WYS also tells them if that size is available — for this exact model and color, right in the row. Shoppers pick a size they can buy, you get fewer wrong orders and fewer returns.
Coming to the Shopify App Store. Write to us and we will help you set up the first chart.
5 statesin stock, low, preorder, sold out, not offered
1 pastefrom Excel, Sheets or a PDF
~10 KBstorefront script, no calls to our server
From $5per month, 14-day trial
A size chart shoppers can act on
Paste, don't retype
Copy a chart from Excel, Google Sheets or a brand PDF. WYS detects sizes, ranges and units and flags typos before you save.
One chart, many products
Rules by vendor, type, tag, collection or title assign charts automatically, new products included (Plus).
Fit finder
Shoppers enter height or measurements and get a size — with an honest note when they are between two (Plus).
Watchdog
New products and sizes missing from a chart are listed with one-click fixes (Pro).
Looks like your store
Popup, inline, drawer or size cards. Fonts and colors from your theme; any Online Store 2.0 theme.
See WYS at work
Why WYS instead of a typical size chart app
| Capability | WYS | Typical size chart apps |
|---|---|---|
| Stock status of each size, per model and color, in the chart | Yes | A static table of measurements |
| Click a row to select the size on the product page | Yes | The table is only for reading |
| Paste from Excel, Sheets or PDF with typo checks | Yes | Retype cells in an editor |
| A watchdog for products and sizes missing from a chart | Yes | Gaps are found by shoppers |
| Charts stay in your store after uninstalling | Yes | Charts live in the app |
| No calls from the storefront to our server | Yes | External script on every page |
“Typical apps” sums up what we found reviewing the leading apps in this Shopify App Store category in 2026.
WYS pricing
Basic
$5/30 days
- Unlimited size charts
- Live stock in every row, by color
- Paste from Excel, Sheets or PDF
- Templates for bikes, clothing, shoes, helmets
- Popup or inline display
Plus
$7/30 days
- Everything in Basic
- Rules by vendor, type, tag, collection, title
- Fit finder by height and measurements
- cm ↔ inch switch
Pro
$10/30 days
- Everything in Plus
- Watchdog for new products and sizes
- Manual variant-to-row matching, exclusions
- Drawer, size cards and all styles
All plans include a 14-day free trial. Yearly billing: two months free ($50, $70, $100 per year). Billing goes through Shopify.
Questions merchants ask
Does WYS work with my theme?
Yes. There is a block for any Online Store 2.0 theme, including Dawn and Horizon, and an embed that finds the size picker on its own. Fonts and colors come from your theme.
Where are my size charts stored?
In your store, as Shopify metaobjects. They stay in Shopify Admin → Content → Metaobjects even if you uninstall WYS.
Does the size chart slow down my store?
No. The chart is rendered by Liquid in your page and the storefront never calls our server. The script is about 10 KB.
Can search engines read the chart?
Yes. The table is part of the product page HTML, so it is indexed together with the product.
Which languages does the storefront chart speak?
English, French, German, Spanish and Russian, with a cm ↔ inch switch on Plus and Pro.
Is there a free plan?
No, but every plan has a 14-day free trial, and Basic costs $5 a month.
Talk to the people who build it
Setup help, a feature you need, a question before installing — write to us. We are a small studio working in the Paris and Moscow time zones, and the developer of WYS reads every message.
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