Kiwi Sizing vs Tailor Size Guide: Honest 2026 Comparison
Side-by-side comparison of Kiwi Sizing and Tailor Size Guide — pricing, features, integrations, support, and which fits your store.
Both apps show up in the same Shopify App Store search. Both are described as "size" tools. That's roughly where the similarity ends.
Kiwi Sizing helps customers find the right size from inventory you already stock. Tailor Size Guide collects the measurements your production team needs to make a garment that doesn't exist yet. One maps a customer to a size label. The other captures the raw numbers behind a custom order.
Same search results. Completely different jobs.
This comparison lays out both tools honestly. Where Kiwi is the right call, we'll say so plainly. Where Tailor Size Guide is the right call, same deal. Installing the wrong one will cost you time either way — so the goal here is a clean decision, not a sales pitch.
Who Each App Is Built For
Kiwi Sizing is built for
- Ready-to-wear brands shipping from existing inventory
- Stores where the goal is recommending the correct size from a fixed range — S through 3XL, W30xL32, EU 38, etc.
- Brands with enough order history to feed a fit recommendation algorithm
- Any Shopify store that needs a size chart, fit quiz, or size recommendation widget
Tailor Size Guide is built for
- Custom tailoring stores making garments to order
- Made-to-measure and bespoke ateliers on Shopify
- Any category where standard sizes don't apply — ethnic wear, bridal, suiting, workwear
- Shopify merchants whose production workflow requires actual body measurements attached to each order, not a size label
Rule of thumb
Feature Comparison
Core Functionality
| Feature | Kiwi Sizing | Tailor Size Guide |
|---|---|---|
| Size chart builder | Yes | No |
| Fit quiz / size recommender | Yes | No |
| Body measurement input form | Partial (outputs a size label) | Structured data for production |
| Measurement data attached to order | No | Yes |
| Step-by-step guided measurement flow | No | Yes |
| Measurement diagrams per body point | No | Yes |
| Custom measurement field builder | No | Yes |
| Pre-built garment templates | No | Yes |
| Fit algorithm trained on order history | Yes | No |
| Size chart synced to product variants | Yes | No |
| International size conversions (US/UK/EU/JP) | Yes | No |
Not a feature gap — a workflow gap
Measurement Collection: Where It Actually Differs
This is the comparison that matters most in practice.
Kiwi Sizing
Kiwi asks customers for height, weight, age, and fit preference. The algorithm processes those inputs and outputs a size label — "You're a Medium" or "Try size 32." The underlying body measurements are consumed internally. After checkout, your fulfilment team sees a size label on the order. They don't see the body measurements that generated it.
For a warehouse picking a pre-made garment, that's all you need. The picker sees "L," grabs the L, ships it.
Tailor Size Guide
Tailor Size Guide asks customers for specific body measurements — chest, waist, hip, sleeve, inseam, and any other fields your production requires. Each field shows a diagram of exactly where to place the tape. Every number is stored as a line item property on the order.
Your production team sees the full measurement breakdown in the Shopify Admin order view, order confirmation emails, and any CSV export.
For a tailor cutting fabric
Garment Category Support
Kiwi Sizing covers mainstream Western apparel well — shirts, trousers, dresses, outerwear, footwear. It handles standard sizing conventions (XS–3XL, US numeric, EU sizes) and converts between international standards reliably. For a brand selling jeans or T-shirts to customers in the US, UK, and Europe, this is solid coverage.
For less standardised categories — bespoke suiting, bridal wear, ethnic and regional garments, any product made to a customer's individual dimensions — Kiwi has no specific support. You can build custom charts manually, but there's no pre-built template and no fit algorithm trained on those categories.
Tailor Size Guide ships with pre-built measurement templates for suits, dress shirts, jackets, trousers, casualwear, dresses, and bridal wear, alongside regional garment categories. Every template is editable: add fields, rename them, change the order, remove the ones you don't need. If your production workflow needs 14 specific measurements for a structured jacket, you build a 14-field template. The app doesn't impose a generic field set on your workflow.
Setup
Both apps install from the Shopify App Store and use the App Embed block system — no code required for either.
Kiwi Sizing setup
Build size charts per product category, configure the fit quiz, and — on the AI recommendation tier — feed in historical order and return data for the algorithm to train on.
Time: 1–3 hours depending on categories and whether you're using algorithm features.
Tailor Size Guide setup
Select a measurement template, assign it to your products or collections, enable the App Embed block in Theme Customizer, test the flow as a customer.
Time: under 20 minutes for most stores. No algorithm to configure, no historical data required.
Pricing
Kiwi Sizing
Verify current pricing on the Shopify App Store.
- Free: basic size charts, limited products
- Basic: ~$9.99/month
- Advanced: ~$19.99/month — AI recommendations, analytics
- Premium: ~$49.99/month — full features, priority support
Pricing scales with order volume and feature depth.
Tailor Size Guide
Verify current pricing at tailorsizeguide.com.
- Flat monthly pricing
- No per-order fees
- Free trial available
Analytics
Kiwi Sizing has the stronger analytics layer. Because it processes fit quiz data and matches it against order and return outcomes, it can surface useful data: which sizes customers are being recommended, how often recommendations lead to purchases, and — with return data connected — whether recommendations are accurate. For a ready-to-wear brand trying to identify which SKUs run small, this is useful.
Tailor Size Guide captures and stores measurement data per order, with operational reporting focused on order completeness — did every order arrive with full measurements, are there any gaps. The raw measurement data is available for export if you want to analyse your customer body measurement distribution yourself, but the app doesn't process this automatically.
Honest Assessment
Kiwi Sizing is the right choice when
- You ship from fixed inventory and need customers to self-select the right size
- You want automatic international size conversion (US/UK/EU/JP)
- You have meaningful order history and want AI-powered size recommendations
- Your category is mainstream Western apparel
- You want analytics on sizing behaviour across your catalog
Tailor Size Guide is the right choice when
- You make garments to order — custom, bespoke, or made-to-measure
- Your production team needs raw measurement data on every order, not a size label
- You're currently chasing customers for measurements via email or WhatsApp after they've paid
- Your store has rework or remake costs caused by incorrect, incomplete, or late measurements
- Returns aren't an option because the garment was made for one specific person
The One Question That Decides It
When an order lands in your Shopify Admin, what does your fulfilment team actually need?
- A size label → Kiwi Sizing.
- A set of measurements → Tailor Size Guide.
That's the whole decision. Budget, review scores, and feature lists are secondary to workflow fit.
Can You Run Both?
Technically yes. Some stores sell a ready-to-wear range and a made-to-measure range from the same Shopify store, which is a legitimate use case for both tools.
In practice, running two separate sizing apps on the same product pages creates conflicts and adds configuration overhead. The cleaner approach: use Tailor Size Guide for your made-to-measure products (where it's necessary), and use Shopify's native size guide block for any ready-to-wear lines (where a static chart is sufficient and free).
FAQs
Is Kiwi Sizing better than Tailor Size Guide?
Neither is better in absolute terms. They solve different problems. Kiwi is better at recommending sizes from existing inventory. Tailor Size Guide is better at collecting measurements for garments being made to order. The right choice depends on whether your store ships from stock or makes garments after the order is placed.
Does Kiwi Sizing work for custom tailoring stores?
Not effectively. Kiwi's output is a size label from your existing range. Custom tailoring needs raw body measurements attached to each order. Kiwi doesn't capture or pass that data to production.
Does Tailor Size Guide recommend sizes?
No. It collects exact measurements and attaches them to orders. There's no size recommendation — because for made-to-order garments, a size label is meaningless. The measurements are the specification.
How long does Tailor Size Guide take to set up?
Under 20 minutes for most stores. Select a template, assign it to products, enable the embed block. No algorithm to configure, no historical data needed.
Which app reduces returns more?
For custom tailoring stores, Tailor Size Guide reduces rework and remake costs more — because it removes the measurement collection gap that causes most custom order errors. For ready-to-wear stores, Kiwi's fit recommendations reduce size-related returns by helping customers pick the correct size from existing stock.
Can Tailor Size Guide handle Western garment categories?
Yes. Templates include suits, dress shirts, jackets, trousers, and casualwear alongside other regional categories. You can also build fully custom field sets for any garment type your production requires.
Where do I install Tailor Size Guide?
From the Shopify App Store or directly at tailorsizeguide.com. Free trial available — no setup fee.
Bottom Line
Sell from stock
Ship from a warehouse. Customers need help finding their size in your existing range.
Kiwi Sizing.
Make garments to order
Production needs real measurements. Customers pay before the garment exists.
Tailor Size Guide.
Still not sure which model fits your store? Book a setup call — takes 10 minutes and you'll know exactly where you stand.
Making garments to order?
Tailor Size Guide is the only Shopify app that collects structured measurements and attaches them to every order. Install free and set up in under 20 minutes.