How to Properly Format Product Attributes in Magento Without Breaking Your Data
A Smarter Fix for Messy Attribute Data

One of the questions that came up in our most recent Magento Ask Me Anything (held monthly for merchants) was around formatting product attributes—specifically, how to clean up attributes like dimensions without ending up with messy, multi-decimal outputs like 12.0000.
On the surface, it seems like a small detail. But the wrong fix can quietly introduce major issues.
The Common (But Risky) Fix
In many Magento builds, developers will try to limit decimal precision by going straight into the database and updating the attribute’s settings. It’s fast. It works. But it can have unintended consequences—especially for merchants already using those attributes across hundreds (or thousands) of products.
If you reduce the decimal places from, say, four to two, Magento doesn’t just round the existing data—it truncates it. That can lead to:
• Broken tax calculations
• Rounding discrepancies
• Issues with logic tied to those values
• Incompatibility with Magento’s expected data structures
In short, a simple database tweak can ripple out in ways that aren’t immediately obvious. We’ve seen it happen.
The Better Way: Use a Frontend Model
Instead of changing how Magento stores the data, change how it renders the data.
A frontend model allows you to customize how attributes are displayed to the customer—without modifying the actual stored values. This gives you full control over formatting while keeping Magento’s core systems and calculations intact.
Some real examples of what a frontend model can do:
• Format dimensions with unit symbols (e.g. 12", 8.5 cm)
• Strip trailing zeros for cleaner display
• Add context to values (like “Length: 12 in” instead of “12.0000”)
It’s a small development task, but it can have a big impact on usability and presentation—especially for sites where product dimensions, weights, or other measurements matter.
Why This Matters
Your product data isn’t just there for internal accuracy—it’s customer-facing. And something as small as four trailing zeros can make a site feel clunky or unfinished. Worse, making the wrong backend change can cause more problems than it solves.
By using a frontend model, you preserve data integrity while making your storefront easier to understand and more aligned with how humans actually read measurements.

Need Help Implementing This?
This kind of task is a perfect fit for SwiftOtter Support—our no-contract, no-handoff service for merchants who need expert help with one-off Magento projects.
Whether it’s formatting attributes, cleaning up legacy product data, or untangling something your last agency left behind—we’ve got your back.
Need Help Cleaning Up Your Product Data?
We can help you implement frontend models to format attributes the right way—clean, user-friendly, and fully compatible with Magento.