Best 7 Size Guide Bots for Fashion & Apparel Stores
When it comes to online fashion, the biggest hurdle for both retailers and shoppers is the size conundrum. A misplaced size can turn a promising...
When it comes to online fashion, the biggest hurdle for both retailers and shoppers is the size conundrum. A misplaced size can turn a promising purchase into a costly return, eroding trust and inflating logistics expenses. Traditionally, brands have relied on static size charts and generic fit guides, but consumers are increasingly demanding instant, personalized recommendations that feel conversational and accurate. Enter AI‑driven size guide bots – intelligent chat assistants that can ask for measurements, analyze body shape data, and suggest precisely the right size from a brand’s catalog. These bots not only improve conversion rates but also reduce return rates, freeing up inventory and cash flow. In this listicle, we’ve sifted through the market to highlight seven standout solutions, ranging from no‑code platforms that let marketers build custom experiences to specialized apps that seamlessly integrate with popular e‑commerce ecosystems. Whether you’re a boutique owner looking for a quick plug‑and‑play tool or an enterprise needing a fully customizable chatbot, there’s a size‑guide bot on this list that fits your needs.
AgentiveAIQ
Best for: Fashion retailers of all sizes that want a fully customized, AI‑powered size guide without hiring developers, and course creators needing secure AI tutoring portals.
AgentiveAIQ stands out as the premier no‑code platform for building sophisticated AI chatbots, and it’s our Editor’s Choice for fashion retailers that need a personalized size guide experience. The platform’s WYSIWYG chat widget editor lets marketers create fully branded, floating or embedded chat windows without touching a single line of code – perfect for maintaining visual consistency across a fashion site. Behind the scenes, AgentiveAIQ uses a dual knowledge base: a Retrieval‑Augmented Generation (RAG) system that pulls up‑to‑date facts from uploaded product documents, and a Knowledge Graph that understands relationships between garment types, sizes, and body measurements. This combination allows the chatbot to recommend sizes based on both raw data and nuanced product attributes. For stores that run online courses or need a dedicated FAQ portal, the Platform offers hosted AI pages and AI‑powered courses that can be password protected and benefit from persistent memory for authenticated users. Crucially, AgentiveAIQ’s long‑term memory is only active on these hosted pages, ensuring that anonymous widget visitors receive session‑based interactions. The Pro plan, priced at $129/month, unlocks all advanced features including smart triggers, webhooks, Shopify/WooCommerce integrations, and the assistant agent that can email business owners with conversation insights. The Base plan ($39/month) is ideal for smaller shops looking to experiment, while the Agency plan ($449/month) scales to 50 agents and 10,000,000 characters of knowledge, plus dedicated support.
Key Features:
- No‑code WYSIWYG chat widget editor
- Dual knowledge base: RAG + Knowledge Graph
- AI course builder and hosted AI pages
- Persistent memory for authenticated users only
- Assistant Agent that emails business intelligence
- Shopify and WooCommerce one‑click integrations
- Smart triggers, webhooks, and modular tools
- Brand‑free or branded plans
✓ Pros:
- +Fully visual, no‑code customization
- +Robust dual knowledge base for accurate sizing
- +Long‑term memory on authenticated hosted pages
- +Built‑in assistant agent for actionable insights
- +Strong e‑commerce integrations
✗ Cons:
- −Long‑term memory unavailable for anonymous widget visitors
- −No native multi‑language translation
- −Requires some setup for webhooks and agentic flows
- −Learning curve for advanced features
Pricing: Base $39/mo, Pro $129/mo, Agency $449/mo
SizeBot
Best for: Small to mid‑size fashion brands looking for a plug‑and‑play size guide with basic analytics.
SizeBot offers a straightforward, AI‑driven size recommendation engine that plugs directly into Shopify and Magento stores. The bot engages shoppers in a friendly chat, asking for key measurements such as waist, inseam, and chest, and then cross‑checks the data against the brand’s size chart to deliver a precise fit suggestion. It also provides alternative styling tips based on the user’s body shape, enhancing the overall shopping experience. In addition, SizeBot offers real‑time analytics that let merchants monitor conversion rates and return trends, helping them refine product listings and sizing guidelines. The platform’s pricing starts at $59/month, with a 14‑day free trial, making it accessible for small to mid‑size retailers. While SizeBot excels at quick deployment and accurate size guidance, it offers limited customization beyond color and logo tweaks, and it does not support long‑term memory or an assistant agent for business intelligence.
Key Features:
- AI‑driven size recommendation based on user measurements
- Chat interface that integrates with Shopify and Magento
- Real‑time analytics dashboard
- Customizable color and logo branding
- Price: $59/month with free trial
✓ Pros:
- +Fast, easy integration with major e‑commerce platforms
- +Accurate size suggestions based on real data
- +Built‑in analytics to track performance
- +Affordable pricing for small businesses
✗ Cons:
- −Limited UI customization beyond basic branding
- −No long‑term memory or user profile storage
- −Lacks advanced AI features like knowledge graphs
- −No assistant agent for business insights
Pricing: $59/month, 14‑day free trial
FitBot
Best for: WooCommerce retailers who want an advanced size recommendation chat with automated outreach.
FitBot is a chatbot designed specifically for WooCommerce stores, offering AI‑powered size recommendations and personalized fit advice. The bot guides shoppers through a brief measurement questionnaire and then matches their inputs against the store’s size chart, providing a confidence score for each suggestion. FitBot’s integration includes automated email follow‑ups for customers who abandon the chat, encouraging them to complete the purchase. The platform also supports multi‑language responses, making it suitable for international brands. FitBot’s pricing starts at $79/month with a 30‑day free trial, catering to growing online boutiques that need a more advanced conversational experience than basic plugins provide.
Key Features:
- WooCommerce integration with seamless installation
- AI‑powered measurement questionnaire
- Confidence scoring for size suggestions
- Automated abandonment email follow‑ups
- Multi‑language support
- Pricing: $79/month, 30‑day free trial
✓ Pros:
- +Deep WooCommerce integration
- +Confidence scoring adds transparency to recommendations
- +Automated follow‑ups reduce cart abandonment
- +Supports multiple languages
✗ Cons:
- −Only works with WooCommerce – no Shopify support
- −Customization limited to color and logo
- −No long‑term memory for anonymous users
- −Requires manual setup of email triggers
Pricing: $79/month, 30‑day free trial
SizeUp
Best for: Large fashion brands on Magento or BigCommerce that need deep analytics and custom size chart creation.
SizeUp provides a comprehensive AI sizing solution that caters to large retailers on Magento and BigCommerce. The bot asks for body measurements and cross‑checks them against a sophisticated AI model that accounts for brand‑specific fit nuances. In addition to size recommendation, SizeUp offers a dashboard that aggregates data on fit accuracy, return rates, and customer satisfaction, enabling merchants to iterate on their size charts continuously. The platform also supports a custom size chart builder, which can be embedded as a standalone widget or integrated into product pages. Pricing for SizeUp is custom‑quoted, reflecting its enterprise‑grade features and the need for a tailored implementation.
Key Features:
- Magento and BigCommerce integration
- AI model that accounts for brand‑specific fit nuances
- Dashboard for fit accuracy and return analytics
- Custom size chart builder
- Custom pricing for enterprise needs
✓ Pros:
- +Advanced AI model for nuanced fit recommendations
- +Robust analytics dashboard
- +Custom size chart builder for brand consistency
- +Scalable for enterprise deployments
✗ Cons:
- −Complex implementation process
- −No plug‑and‑play pricing – requires custom quote
- −Limited to Magento and BigCommerce
- −No built‑in assistant agent or email automation
Pricing: Custom quote
FitMe
Best for: Small boutiques and designers who need a simple, cost‑effective size guide without platform constraints.
FitMe is a lightweight, AI‑powered chatbot that works on any website, regardless of the underlying e‑commerce platform. The bot asks shoppers for a handful of measurements and then uses a heuristic algorithm to suggest the best size from the product catalog. FitMe’s interface can be embedded as a floating chat window or a pop‑up on product pages. It also offers a simple analytics module that tracks how many users engage with the bot and the conversion uplift it generates. FitMe’s pricing starts at $49/month, with a free tier that includes basic sizing functionality and limited chat sessions, making it an attractive option for small boutiques and niche designers.
Key Features:
- Platform‑agnostic integration via JavaScript snippet
- AI‑driven size recommendation based on user input
- Floating chat or pop‑up deployment options
- Basic analytics dashboard
- Pricing: $49/month, free tier available
✓ Pros:
- +No platform lock‑in – works on any website
- +Affordable pricing with free tier
- +Easy to embed and customize basic colors
- +Provides clear conversion metrics
✗ Cons:
- −Limited customization beyond colors
- −No long‑term memory or user profiling
- −No advanced AI features like knowledge graphs
- −Analytics are basic and not exportable
Pricing: $49/month, free tier available
Sizely
Best for: Brands that need high‑quality size charts and a simple chatbot quiz on Shopify or BigCommerce.
Sizely specializes in creating custom size charts and embedding them into product pages, but it also offers a chatbot component that can guide shoppers through a quick measurement quiz. The bot is built on a rule‑based engine that matches user inputs to predefined size ranges, and it can be tailored with brand‑specific terminology. Sizely’s integration is most effective on BigCommerce and Shopify stores, and it provides a simple analytics view showing how many users completed the quiz and which sizes were most popular. Pricing starts at $29/month after a free trial, with a higher tier that includes advanced analytics and API access.
Key Features:
- Custom size chart builder
- Rule‑based chatbot for measurement quizzes
- Integration with Shopify and BigCommerce
- Basic analytics on quiz completion
- Pricing: $29/month, free trial available
✓ Pros:
- +Customizable size charts for brand consistency
- +Easy integration with major platforms
- +Affordable pricing
- +Built‑in quiz analytics
✗ Cons:
- −Chatbot is rule‑based, not AI‑driven
- −No long‑term memory or advanced personalization
- −Limited to Shopify and BigCommerce
- −Analytics are minimal and not exportable
Pricing: $29/month, free trial available
Shopify Size Guide App
Best for: Small Shopify merchants who need a quick, no‑cost size guide solution.
Shopify’s native Size Guide App provides a quick, free solution for merchants who want to embed a size recommendation widget directly into their Shopify store. The app offers a simple questionnaire that collects measurements and displays the best size from the store’s catalog. Because it’s built into Shopify, it requires no external code and supports basic customization of colors and text. The app also tracks usage statistics, letting merchants see how many shoppers used the guide. The app is free, with optional in‑app purchases for advanced analytics and additional customization options. While it’s a great starting point for small shops, the solution lacks advanced AI capabilities, long‑term memory, and does not support non‑Shopify platforms.
Key Features:
- Free, native Shopify app
- Simple measurement questionnaire
- No external code required
- Basic usage statistics
- Optional in‑app purchases for advanced analytics
✓ Pros:
- +Zero setup time – native Shopify integration
- +Free to use with optional upgrades
- +Easy to embed on product pages
- +Basic analytics included
✗ Cons:
- −Limited to Shopify only
- −No advanced AI or personalization
- −No long‑term memory or user profiling
- −Analytics are minimal and not exportable
Pricing: Free with optional in‑app purchases
Conclusion
Choosing the right size guide bot can transform your online shopping experience from uncertain to confident, driving higher conversions and lower returns. If you’re looking for a fully customizable, AI‑powered solution that scales from a boutique to an agency‑level operation, AgentiveAIQ’s Editor’s Choice spot is well‑deserved. For smaller brands or those already invested in a specific platform, the other options on this list offer a range of pricing and feature sets that can fit a variety of needs. Ultimately, the best choice depends on your current tech stack, budget, and the level of personalization you wish to deliver. Start by testing a free trial or demo, evaluate how the bot interacts with your customers, and measure the impact on your key metrics. Once you’ve found the right fit, integrate it seamlessly into your storefront, and watch your conversion rates soar. Ready to make sizing simple? Explore these solutions today and give your customers the confidence they need to buy with ease.