How can I change the measurement units of my products?

You can certainly adjust how measurements appear, though the process depends on where the units are displayed. Whether you are looking to update your size guides for customers or check design file dimensions, Printful offers several ways to manage your preferred unit system (metric or imperial). Here is a breakdown of how to handle each case.

Size guide measurements

When you're pushing a product to your store, you can select the unit system for the size guide—metric (cm) or imperial (in). This choice determines how product measurements are displayed to your customers.

If you want to change the measurement units after the product has already been published, you have two options:

Delete and republish the product with the preferred unit system
Manually update the product details directly from your store platform

Products with measurement units in variant names

Products like Mugs, where variant names include fixed measurements (e.g., 11 oz, 15 oz, 20 oz), the measurement units cannot be changed from within Printful. If you'd like to display different units (such as milliliters instead of ounces), you can:

Manually convert the measurements to your preferred unit system
Create the product directly on your store platform with your custom variant names
Import the product to Printful and manually sync it with the correct Printful product and variants

An exception is the Matte Paper Posters; they’re available in two separate versions, one with sizes in centimeters (cm) and one with sizes in inches (in). You can choose the appropriate version during product selection to match your preferred measurement system for variant names. For example:

Design file measurements

Design file dimensions found in the File guidelines tab are shown in either inches or centimeters based on your geolocation when visiting the Printful website. This setting can’t be changed manually, but it doesn’t affect how your files are printed, just how measurements are displayed to you.

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