Size charts next to the size selector, a Find my size recommender and buyer fit feedback.
Available Updated Oct 24, 2026Version 1.0.0CS-Cart, Multi-Vendor 4.17.2 – 4.21.x No core file edits
Built for
Size Guide & Fit Finder: overview1 of 23
What it does
CS-Cart has no size charts, so stores paste images into descriptions that shoppers miss and cannot read on a phone. This add-on keeps real size tables with sizes, measurements and custom columns such as EU or US sizes, starts from seven templates, and shows the right chart for every product next to its size option or variation, on the product page and in quick view. It is made for clothing, footwear and kids' stores and for fashion marketplaces.
How it works
In Products, Size charts, pick a template or build a table, add a measuring guide and assign the chart to categories, brands, vendors or products with priorities. The Size guide link appears next to the size selector. Shoppers switch between cm and inches, read how to measure and use Find my size. After delivery they answer How did it fit on their order page; you approve the answers. Vendors can manage charts for their own products.
Features
Size chart builder with measurement and custom columns, ranges and aliases
Seven templates for tops, bottoms, dresses, shoes and kids' clothing
Assignment by category, brand, vendor and product with priorities
Link next to size options and size variations, also in quick view
Accessible window, full-screen on phones, cm/in and kg/lb switch
Find my size from measurements or a known size in another chart
Recommended size highlighted and selected in one click
Buyer fit feedback with moderation and fit hints on the product page
CSV import and export, optional product tab
Vendor charts for Multi-Vendor, full page cache support
What you get
Package
kv_size_guide_fit-1.0.0.zip, installed through Add-ons → Manage add-ons
Updates & support
12 months included. Download new versions from your account and install them in Add-ons → Manage add-ons or the Upgrade Center.
License
1 production installation. Staging, dev and localhost are free and unlimited. The add-on keeps working after the update period ends. How licensing works
For developers
Uses 3 CS-Cart PHP hooks. No core files are changed.
Compatibility
We list only the builds we install and test on. “Tested” means the full test plan was run on that build; “Supported” means the build is inside the supported range and uses the same hooks.
CS-Cart version and edition compatibility
CS-Cart version
CS-Cart
CS-Cart Ultimate
Multi-Vendor
Multi-Vendor Ultimate
4.22 and later
Testing next
Testing next
Testing next
Testing next
4.21.2
Supported
Supported
Supported
Supported
4.20.x
Supported
Supported
Supported
Supported
4.19.x
Supported
Supported
Supported
Supported
4.18.x
Supported
Supported
Supported
Supported
4.17.2
Tested
Supported
Tested
Supported
Before 4.17.2
Not supported
Not supported
Not supported
Not supported
Last tested build: Multi-Vendor 4.17.2, Oct 24, 2026Tested on: Multi-Vendor 4.17.2, CS-Cart 4.17.2
Requirements
Platform
CS-Cart or CS-Cart Multi-Vendor 4.17.2 – 4.21.x
PHP
PHP 7.2.5 – 8.3 (as supported by your CS-Cart version)
Requirement
Products whose size is a product option or a variation feature (for the link next to the selector). Products without a size selector still show the link below their options
Core changes
None. Hooks and template overrides only
1.0.0
Oct 24, 2026
Latest
Added 10
Size chart builder: sizes x measurement columns (chest, bust, underbust, waist, hips, height, weight, inseam, neck, sleeve, foot length, head) and custom text columns, ranges or single values, size aliases, how-to-measure text and illustration, texts per language.
Seven chart templates: women's and men's tops, women's and men's bottoms, dresses, shoes, kids' clothing.
Assignment by category (with subcategories), brand, vendor and product, with priorities, a per-product "Size guide" tab (automatic, specific chart, none) and an assignments overview with a "which chart does this product use?" check.
"Size guide" link next to the size option or variation selector on the product page and in quick view, with an accessible, mobile full-screen window: size table with cm/in and kg/lb switch, measuring guide, Find my size.
Find my size: rule-based recommendation from body measurements or from a size in a reference chart, with confidence, between-sizes advice, highlighted row and selector value, "Select size" button; measurements kept only in the shopper's browser.
Fit feedback on the customer's order page with moderation, totals shared by variation groups, fit hints on the product page that also adjust the recommendation.
CSV import and export of chart tables, table paste from spreadsheets.
Optional "Size guide" product tab.
Multi-Vendor: vendors manage charts for their own products (optional). Ultimate: charts per storefront or shared.
Full page cache support (4.21), self-healing upgrades, license client.
Tested on Multi-Vendor 4.17.2, CS-Cart 4.17.2. First release.
My size option is not called "Size". Will the link still find it?
Yes. Add its name to Size option names, or leave it: when no name matches, the add-on uses the option or variation feature whose values match the chart sizes (at least two of them). If nothing matches, the link appears below the product options.
My variants are called "Small, Medium, Large". The chart says S, M, L.
They match automatically: spelled-out sizes (Small, Medium, Large, X Large, XX Large, Extra small ...) are treated as their codes. For other names add aliases to the chart rows (for example 38 for M).
Can one product use a different chart than its category?
Yes. Open the product, go to the Size guide tab and choose the chart, or add the product to the chart's Products list. You can also choose No size guide for products that do not need one (bags, accessories).
How accurate is Find my size?
It follows your chart exactly: it compares the shopper's measurements with the ranges of each size and says how well they fit (Great match, Good match, Rough estimate). It does not guess with AI and does not need any external service. Good charts give good answers: use the measurements of your own garments.
Are shoppers' measurements stored on my server?
No. Measurements stay in the shopper's browser (only when they tick "Remember my measurements") and are never sent to the store. Fit feedback stores only the answer (runs small, true to size, runs large) with the order.
Does it work with full page cache and with my theme?
Yes. The product page output is the same for every visitor, so cached pages are safe. The link adapts to the Responsive, Bright and Nova themes and themes based on them; the window has its own neutral styling that fits any theme.
Can vendors add their own charts?
Yes, when Allow vendors to manage size charts is on. Their charts apply only to their own products.
What happens if the license lapses?
Without a valid license (no key after the 14-day start period, an invalid or revoked key, a domain the license does not cover, or no successful check for 14 days), the size guide link, size chart window, Find my size and fit hints are hidden on the storefront and no new fit feedback is collected. Your charts, assignments and feedback stay saved and editable. Once the license is valid again, everything is shown again.
The admin panel shows a license notice.
Open Add-ons → Manage add-ons → Size Guide & Fit Finder → Settings → License. The status line says what is wrong: no key, a key for another add-on, a revoked license, or a domain that the license does not cover. Fix it and click Check now. See License.
Does the add-on work on my staging copy?
Yes. Subdomains of your licensed domain (for example staging.yourstore.com) and local development hosts (localhost, private IP addresses, .local, .test) are covered by the same license.
Does the license check slow down my storefront or checkout?
No. The check runs in the admin panel or from cron, once a day. The storefront never runs it.
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