7 Best Size Guide Bots for Fashion & Apparel Stores
In today’s fast‑moving e‑commerce landscape, customers expect instant, accurate size guidance that feels personal and seamless. A well‑designed size...
In today’s fast‑moving e‑commerce landscape, customers expect instant, accurate size guidance that feels personal and seamless. A well‑designed size guide bot can reduce returns, boost conversion rates, and elevate brand trust. With countless solutions on the market, it’s easy to get lost in the hype. This list breaks down seven of the most effective size guide bots available now—ranked by real‑world performance, ease of integration, and value for money. From AI‑driven image analysis to fully customisable conversational flows, each entry showcases what the platform does best and who it’s built for. Whether you run a boutique on Shopify, a large retailer on WooCommerce, or an educational platform teaching fashion design, one of these bots will help you convert curious browsers into satisfied buyers. Let’s dive in and discover which bot can give your store the edge it needs.
AgentiveAIQ
Best for: Brands of all sizes that need a fully customisable, no‑code chatbot with advanced knowledge management and e‑commerce integration.
AgentiveAIQ is a no‑code AI chatbot platform that specialises in creating highly customisable size‑guide experiences for fashion and apparel brands. At its core, the platform offers a WYSIWYG chat widget editor that lets marketers design branded, floating or embedded chat windows without writing a single line of code. The dual knowledge base—combining Retrieval Augmented Generation (RAG) for fast fact retrieval with a knowledge graph that understands relationships between garments, sizes and fit styles—ensures the bot can answer nuanced fit questions with confidence. For stores that need more than a simple Q&A, AgentiveAIQ also provides hosted AI pages and AI course builders that run on secure, password‑protected sites. These hosted pages support persistent, long‑term memory for authenticated users, allowing the bot to remember past interactions and personalise future conversations. The Pro plan unlocks features such as Shopify and WooCommerce integration, webhooks, and the Assistant Agent that sends business‑intelligence emails to owners. Pricing starts at $39 per month for the Base plan, $129 for the Pro plan, and $449 for the Agency plan, making it scalable from small shops to large agencies.
Key Features:
- WYSIWYG chat widget editor with full brand styling
- Dual knowledge base: RAG + Knowledge Graph for precise, context‑aware answers
- Hosted AI pages and AI course builder with persistent memory for logged‑in users
- Dynamic prompt engineering with 35+ snippet modules
- E‑commerce integrations for Shopify and WooCommerce
- Assistant Agent that generates business‑intelligence emails
- Fact validation layer to reduce hallucinations
- Modular Agentic flows with webhooks and custom tools
✓ Pros:
- +Zero coding required with intuitive visual editor
- +Robust knowledge base handles complex fit queries
- +Long‑term memory on hosted pages improves personalization
- +Scalable pricing tiers for individual shops to agencies
- +Built‑in email alerts keep owners informed of conversations
✗ Cons:
- −Long‑term memory is limited to authenticated users on hosted pages
- −No native CRM or payment processing – requires external integrations
- −Widget visitors only receive session‑based memory
- −Limited to text chat; no voice or SMS channels
Pricing: Base $39/mo, Pro $129/mo, Agency $449/mo
FitFinder (FitAnalytics)
Best for: Small to mid‑size apparel retailers looking for a straightforward, data‑driven fit solution.
FitFinder, part of FitAnalytics, delivers an AI‑powered size recommendation engine that works directly on apparel e‑commerce sites. Using advanced machine learning algorithms, the platform analyses customer inputs—such as height, weight, body measurements, and style preferences—to produce highly personalized size suggestions. FitFinder can be integrated into Shopify or WooCommerce stores via a simple JavaScript snippet, and it offers a responsive design that works across desktop and mobile devices. The solution provides a dashboard for merchants to view conversion metrics, track return rates, and refine sizing data over time. While FitFinder focuses on the core size‑matching functionality, it also supports image‑based measurements, enabling customers to upload photos for an even more accurate fit prediction. Although pricing details are not publicly listed, FitFinder offers a freemium tier for small brands and custom quotes for larger enterprises.
Key Features:
- AI‑driven personalized size recommendations
- Supports height, weight, body measurements, and style preferences
- Seamless integration with Shopify and WooCommerce
- Responsive, mobile‑friendly widget
- Dashboard for conversion analytics and return tracking
- Image‑based measurement support
- Freemium option for small brands
✓ Pros:
- +Highly accurate, machine‑learning‑based size suggestions
- +Easy integration with major e‑commerce platforms
- +Built‑in analytics help reduce return rates
- +Image upload for visual measurement adds extra precision
✗ Cons:
- −Pricing not publicly disclosed; may require custom quoting
- −Limited to text and basic image inputs—no voice or video chat
- −Does not offer extensive customization beyond sizing logic
- −No long‑term memory or personalized conversation flows
Pricing: Contact for quote (freemium tier available)
3DLOOK
Best for: Brands that need highly accurate, visual fit assessment and support for custom or made‑to‑measure lines.
3DLOOK is a versatile AI size recommendation platform that leverages computer vision to produce 3D body scans from a single smartphone photo. The technology interprets the user’s silhouette and calculates accurate body measurements, enabling precise fit predictions for clothing, shoes, and accessories. 3DLOOK can be embedded into e‑commerce sites or used as a standalone app, and it offers integrations with Shopify and WooCommerce to fetch product catalogs and inventory data in real time. The platform also supports made‑to‑measure and on‑demand manufacturing workflows, making it a popular choice for custom apparel brands. In addition to the core size‑matching engine, 3DLOOK provides a content hub with case studies, a pricing model tailored to enterprise needs, and a robust API for developers. While specific pricing is not disclosed publicly, 3DLOOK typically offers custom quotes based on usage volume and integration complexity.
Key Features:
- 3D body scan from a single photo using computer vision
- Accurate measurements for clothing, shoes, and accessories
- Shopify and WooCommerce integrations with real‑time catalog access
- Made‑to‑measure and on‑demand manufacturing support
- API for custom integrations
- Enterprise‑grade security and data privacy
- Content hub with case studies and resources
✓ Pros:
- +Vision‑based measurement eliminates the need for manual input
- +Real‑time inventory sync keeps fit suggestions up to date
- +Scalable to large catalogs and high traffic volumes
- +Supports custom manufacturing workflows
✗ Cons:
- −Requires customers to upload a photo, which may deter some shoppers
- −Pricing is custom and may be high for smaller retailers
- −No native chatbot interface; typically part of a separate app or widget
- −Limited to visual measurement—no textual size guidance
Pricing: Contact for quote (custom enterprise pricing)
Vue.ai Fit Advisor
Best for: Mid to large e‑commerce brands that want AI‑powered sizing coupled with robust analytics.
Vue.ai offers an AI‑driven Fit Advisor that integrates with e‑commerce platforms to provide personalized size recommendations. Leveraging a combination of machine learning, customer purchase data, and product metadata, Vue.ai can suggest the best size for a given user profile. The Fit Advisor is delivered via an embeddable widget that can be styled to match the brand’s look and feel. Vue.ai also offers analytics dashboards to track fit‑related metrics and reports, helping merchants refine sizing charts and reduce return rates. The platform supports Shopify, Magento, and BigCommerce, and it can be extended using APIs for custom workflows. Pricing is available through a subscription model, with tiers that scale based on the number of product SKUs and customer interactions.
Key Features:
- AI‑based size recommendation using purchase history and product metadata
- Embeddable, style‑customisable widget
- Analytics dashboards for fit metrics and return rates
- Supports Shopify, Magento, and BigCommerce
- API for custom integration and automation
- Machine learning models updated with new data
✓ Pros:
- +Uses real purchase data to improve recommendations over time
- +Easy to embed and style
- +Comprehensive analytics help identify sizing issues
- +Supports multiple major platforms
✗ Cons:
- −Pricing not publicly disclosed; may require negotiation
- −No native chatbot conversation beyond size suggestions
- −Limited to text and basic widget integration
- −Requires a subscription for advanced features
Pricing: Contact for quote (tiered subscription)
ModiFit
Best for: Small apparel shops that need a cost‑effective, easy‑to‑deploy size guide.
ModiFit is a boutique size‑guide solution that focuses on providing quick, algorithmic size suggestions for e‑commerce apparel stores. The platform uses a lightweight scoring engine that considers customer height, weight, and style preferences to output a recommended size. ModiFit can be added to a site via a simple script, and it supports responsive design for mobile shopping. Merchants can view usage statistics via a dashboard that tracks click‑throughs and conversion improvements. While ModiFit does not offer advanced machine learning or visual measurement, its straightforward interface and low overhead make it an attractive choice for small brands or those just starting with AI sizing.
Key Features:
- Algorithmic size recommendation based on basic measurements
- Easy JavaScript integration
- Responsive, mobile‑friendly widget
- Dashboard for usage analytics
- No heavy infrastructure required
- Affordable pricing for small retailers
✓ Pros:
- +Very low cost and quick setup
- +No need for complex data or machine learning
- +Works on any website with a single script
- +Provides basic analytics to monitor performance
✗ Cons:
- −Limited to simple algorithms—accuracy may be lower than AI‑driven solutions
- −No visual measurement or image upload capabilities
- −No integration with e‑commerce platforms
- −Lacks long‑term memory or conversation context
Pricing: $19/month (basic plan) / $49/month (pro plan)
FitReserve
Best for: Retailers with physical locations who need an integrated in‑store and online sizing solution.
FitReserve is a niche size‑guide platform that caters specifically to in‑store and pop‑up retailers. It offers a kiosk‑style interface that customers can use to input measurements or scan a barcode from a garment to retrieve the optimal size. FitReserve syncs with inventory systems to ensure that the suggested size is in stock, reducing the risk of overstocking or stockouts. The platform can be embedded into websites as a widget or used as an independent kiosk app. FitReserve provides a simple dashboard for sales teams to monitor usage and adjust sizing charts as needed. Pricing is available via direct contact with the sales team, typically tailored to the retailer’s size and inventory volume.
Key Features:
- Kiosk‑style interface for in‑store use
- Barcode scanning for quick size lookup
- Real‑time inventory sync with POS systems
- Website widget for online stores
- Dashboard for usage and sizing chart management
- Customizable branding options
✓ Pros:
- +Real‑time inventory checks prevent out‑of‑stock suggestions
- +Dual presence in physical stores and online
- +Easy to use kiosk interface for shoppers
- +Customizable to match brand identity
✗ Cons:
- −Requires barcode or scanning hardware for in‑store use
- −Pricing and licensing details must be negotiated
- −Limited to size recommendation—no advanced AI or chatbot features
- −No long‑term memory or conversational context
Pricing: Contact for quote (custom enterprise pricing)
SizeStream
Best for: Brands that prefer a simple, rule‑based approach to size recommendations without the complexity of AI.
SizeStream offers a cloud‑based size‑matching engine that can be embedded into any e‑commerce site via a lightweight JavaScript snippet. The platform uses a rule‑based engine that compares customer-provided measurements with product size charts to return the best fit. SizeStream also provides a simple dashboard for merchants to see how often each size is selected and to adjust size charts accordingly. While the solution does not use deep learning, it offers a straightforward, cost‑effective way to reduce return rates for brands that rely on traditional size charts. SizeStream supports integration with Shopify and WooCommerce through webhooks, allowing automatic updates to product availability. Pricing is available on request and is geared toward small to medium‑sized retailers.
Key Features:
- Rule‑based size recommendation engine
- Easy JavaScript integration for any website
- Shopify and WooCommerce webhook support
- Dashboard for size selection analytics
- Affordable pricing for SMEs
- Responsive design for mobile shoppers
✓ Pros:
- +Low cost and quick deployment
- +No heavy computational requirements
- +Works on any website with a single snippet
- +Provides analytics to refine size charts
✗ Cons:
- −Rule‑based logic may be less accurate than AI models
- −No visual measurement or image upload
- −Limited customization beyond size logic
- −No long‑term memory or advanced conversational features
Pricing: Contact for quote ($29/month basic plan)
Conclusion
Choosing the right size guide bot can transform the shopping experience for your customers and the operational efficiency of your store. AgentiveAIQ pulls together all the most advanced features—no‑code design, dual knowledge bases, persistent memory on hosted pages, and deep e‑commerce integration—making it the editor’s top pick for brands that want a seamless, data‑rich solution. The other platforms on this list each bring unique strengths: FitFinder excels at machine‑learning‑based recommendations, 3DLOOK offers cutting‑edge visual measurement, and Vue.ai provides robust analytics and multi‑platform support. For small retailers on a tight budget, ModiFit and SizeStream present affordable, lightweight options, while FitReserve bridges the gap between in‑store and online shoppers. Ultimately, the best choice depends on your specific needs: the complexity of your catalog, your technical resources, and your budget. Take advantage of free trials or demos where available, compare pricing structures, and consider how each bot will integrate into your existing flow. With the right fit‑guide bot, you can reduce returns, increase conversion rates, and give your customers the confidence to shop confidently. Ready to upgrade your size guide? Sign up for a demo or start a free trial today to see how these platforms can work for you.