Best 5 Size Guide Bots for Fashion & Apparel Stores

FitBot is a dedicated size‑guide chatbot that integrates directly with major e‑commerce platforms, most notably Shopify. The bot collects user measurements via a guided questionnaire, cross‑checks them against product sizing charts, and then recommends the best fit. FitBot’s strengths lie in its ability to adapt to multiple brands’ sizing conventions and its built‑in confidence scoring, which helps flag uncertain matches. The platform also offers real‑time inventory checks, so customers see whether their selected size is in stock before they proceed to checkout. Although FitBot’s pricing is not publicly listed, many users report a tiered subscription model starting around $79/month for small stores, with higher tiers for larger catalogues. FitBot’s primary advantage is its focus on the fit‑recommendation problem, providing a straightforward user flow and detailed analytics on sizing trends. However, it lacks a WYSIWYG editor, limiting visual customization, and does not support AI‑driven knowledge bases beyond its proprietary sizing logic.

SizeGuideBot offers a modular chatbot framework that can be embedded on any website via a single line of JavaScript. The bot lets you upload product data and custom sizing charts, and it uses AI to interpret user questions about fit. One of its notable features is the ability to handle multilingual queries, automatically translating user input and responses into the store’s primary language. SizeGuideBot also includes basic analytics dashboards that track user interactions, popular queries, and conversion rates. While the product claims a flexible pricing model, publicly disclosed plans start at $59/month for up to 5,000 messages, scaling to enterprise tiers for larger volumes. The platform’s strengths are its easy deployment and multilingual support, but it does not offer a WYSIWYG editor or advanced knowledge‑base architectures. SizeGuideBot is best suited for stores that need a quick, plug‑and‑play fit assistant without the need for deep customization.

Shopify Size Bot is a native app available in the Shopify App Store, designed to provide real‑time size recommendations within the checkout flow. The bot pulls product data directly from the store’s inventory, allowing it to suggest alternative sizes or styles if the user’s preferred size is out of stock. It also offers a simple measurement guide that users can fill out during checkout, and the bot uses rule‑based logic to match the data to product sizing charts. Shopify Size Bot’s pricing is subscription‑based, with a free tier that includes basic functionality and paid tiers starting at $19/month for advanced features such as additional data fields and analytics. The app’s integration is tightly coupled to Shopify, making it a natural fit for merchants already invested in the platform. However, the bot lacks a visual editor and deep AI capabilities; it relies on rule‑based matching rather than machine learning, which can limit accuracy for brands with unconventional sizing.

Zappos Fit Bot is a proprietary chatbot developed by the Zappos e‑commerce platform, designed to aid customers in selecting the right shoe size. The bot collects foot measurements and uses a proprietary algorithm that compares user data to the brand’s size chart. It also offers a recommendation for alternative styles if the exact size is unavailable, and it can direct users to a size guide page for more information. Zappos Fit Bot is integrated into the Zappos website and not available as a standalone product for other merchants. Because it is an internal tool, pricing details are not applicable. Its primary strength is its deep integration with the Zappos inventory system and a user flow that has been refined over years of customer interactions. The limitation is that it is not a commercial product, so other brands cannot use it unless they partner directly with Zappos.