Smart Size Chart & Size Guide vs Stamp ‑ Variants on Collectionfor Shopify (2026)
Smart Size Chart & Size Guide and Stamp - Variants on Collection are both Shopify apps in the 'Product display', 'Custom products', and 'Product variants' categories, but they address very different needs. Smart Size Chart & Size Guide focuses on helping customers find the right size, thereby reducing returns and increasing sales. Its strength lies in providing customizable, brand-consistent size charts for various product types. Stamp - Variants on Collection, on the other hand, centers on improving product discovery and conversion rates by showcasing product variants more effectively on collection pages. It allows merchants to split variants into separate products and provides granular control over variant display and sorting. Smart Size Chart & Size Guide is best suited for merchants selling apparel, shoes, jewelry, or other products where size is a critical factor in the purchase decision. It caters to a need for clear and accessible size information. Stamp - Variants on Collection appeals to merchants with a large number of product variants who want to improve the shopping experience and make it easier for customers to find what they are looking for. The difference is primarily in the application: size-related assistance versus variant display optimization.
At a Glance
Smart Size Chart & Size Guide
103 reviews
Stamp ‑ Variants on Collection
36 reviews
Detailed Overview
Smart Size Chart & Size Guide
Increase sales with stylish, unlimited size charts and size guides that fit your brand design.
Key Features
- Highly customizable: Add images, brand colors, fonts, and adjust popup position.
- Content-rich: Size chart templates for clothing, shoes, jewelry, pets, and more.
- Responsive design: Size charts look perfectly on mobile, desktop, and tablets.
- Lightweight app: Installs easily and removes cleanly without leftover code.
- Advanced features: Multi-language size charts, tabs for multiple size guides.
Stamp ‑ Variants on Collection
Show product variants on collection page or show variants price range with Stamp. Boost your sale!
Key Features
- Stamp show variants as separate products on collection pages or show price range
- Split variants as products on homepage, search results or any collection pages
- Hide unavailable/no image variants, Mix variants, Infinite scroll, Add to cart..
- Sort variants manually, show selected variants, customize setting per collection
- Smart collection sort products and variants on collection pages by best-seller
Feature Comparison
| Rating | 5/5 | 4.9/5 |
Rating Smart Size Chart & Size Guide5/5 Stamp ‑ Variants on Collection4.9/5 | ||
| Reviews | 103 | 36 |
Reviews Smart Size Chart & Size Guide103 Stamp ‑ Variants on Collection36 | ||
| Primary Function | Creating and displaying customizable size charts | Displaying product variants on collection pages |
Primary Function Smart Size Chart & Size GuideCreating and displaying customizable size charts Stamp ‑ Variants on CollectionDisplaying product variants on collection pages | ||
| Key Feature: Customization | Highly customizable size charts with images, colors, and fonts. | Customizable display settings per collection, manual variant sorting. |
Key Feature: Customization Smart Size Chart & Size GuideHighly customizable size charts with images, colors, and fonts. Stamp ‑ Variants on CollectionCustomizable display settings per collection, manual variant sorting. | ||
| Target Merchant | Businesses selling products where size is important (clothing, shoes, etc.) | Businesses with numerous product variants seeking improved product discovery. |
Target Merchant Smart Size Chart & Size GuideBusinesses selling products where size is important (clothing, shoes, etc.) Stamp ‑ Variants on CollectionBusinesses with numerous product variants seeking improved product discovery. | ||
| Value Proposition | Reduce returns and increase sales by helping customers find the right size. | Boost sales by making it easier for customers to find and purchase specific product variants. |
Value Proposition Smart Size Chart & Size GuideReduce returns and increase sales by helping customers find the right size. Stamp ‑ Variants on CollectionBoost sales by making it easier for customers to find and purchase specific product variants. | ||
| Focus | Customer Fit & Sizing | Variant Presentation & Navigation |
Focus Smart Size Chart & Size GuideCustomer Fit & Sizing Stamp ‑ Variants on CollectionVariant Presentation & Navigation | ||
| Mobile Responsiveness | Responsive design for mobile, desktop, and tablets | Implied (as not explicitly stated, but expected) |
Mobile Responsiveness Smart Size Chart & Size GuideResponsive design for mobile, desktop, and tablets Stamp ‑ Variants on CollectionImplied (as not explicitly stated, but expected) | ||
- Conversion Audit
- Speed Audit
- SEO Audit
Conversion Audit
Our Verdict
For merchants prioritizing reducing returns and improving the sizing experience for customers buying products like clothing or shoes, Smart Size Chart & Size Guide is the clear winner. Its focus on customizable and informative size charts directly addresses this need. The higher rating and larger number of reviews also suggest broader satisfaction with its performance.
However, if a merchant's primary concern is showcasing a large number of product variants on collection pages and improving product discovery, Stamp - Variants on Collection is the more suitable choice. It provides the tools to effectively manage and display variants, enhancing the shopping experience for stores with complex product catalogs.
Common Questions
Which app is easier to use?
While it's subjective, Smart Size Chart & Size Guide likely has a simpler initial learning curve due to its focused function of creating size charts. Stamp - Variants on Collection, with its more complex variant management features, may require more setup and understanding.
Which app offers better value for money?
Without pricing information, it's impossible to say definitively. However, consider which app directly addresses the most pressing need. If returns due to incorrect sizing are a major issue, Smart Size Chart & Size Guide offers significant value. If variant discoverability is the problem, Stamp - Variants on Collection is the better investment.
Can I use both apps together?
Potentially, yes. A merchant could use Smart Size Chart & Size Guide to address sizing concerns and Stamp - Variants on Collection to improve how those sized products and their variants are displayed on collection pages. They address distinct, though complementary, aspects of the shopping experience.
Does Smart Size Chart & Size Guide support multiple languages?
Yes, it includes multi-language size charts as an advanced feature. Stamp - Variants on Collection does not explicitly mention multi-language support.
Does Stamp ‑ Variants on Collection offer size chart functionality?
No, Stamp ‑ Variants on Collection focuses on showcasing product variants and does not include features for creating size charts.
Get More From Your Shopify Store
Run audits for SEO, CRO, PageSpeed, and AI visibility. Get a clear report and actionable fixes.
Try Fix My Store