The Complete SKU Playbook for 3D Printing Businesses

A SKU is a Stock Keeping Unit, a way to identify a product. But how you structure your SKUs determines whether your production workflow runs cleanly at 50 orders a day or falls apart at 20.

Start here before you build your catalog.

What a SKU Is in Printago

In Printago, a SKU is basically an assembly: one or more parts, with defined quantities and material assignments, that together represent a complete product ready for production. It's the connection between your 3D models and your order workflow.

A SKU can be:

• A single STL or 3MF part
• A parametric model (OpenSCAD, CadQuery, or similar)
• Any combination of the above

SKUs are also what Printago uses for e-commerce integrations. When an order comes in from Etsy or Shopify, it maps to a SKU. If something doesn't have a SKU, it can't be automated.

The Core Structure

Every SKU has three things you need to think about:

Parts. Which 3D model files make up this product? A single STL, multiple STLs, a 3MF with multiple objects, a parametric model. All valid.

Quantities. How many copies of each part per order unit? Most products are 1 of 1. But a set of four coasters is 4 of 1 part. A left/right earbud holder is 1 each of 2 different parts.

Materials. What filament does each part need? This drives routing because Printago will only send a job to a printer with the right material loaded. For customer-selectable options like color, that's handled through Variants.

Building Your First SKU: Step by Step

Upload your part file(s) to Printago's parts library first. You can't create a SKU without at least one part.

1. Navigate to Products > SKUs and click Create New SKU
2. Give it a SKU value (your internal identifier, keep it meaningful like CABLE-ORG-LG), a title, and a description
3. Add linked parts and set the quantity for each
4. Set material overrides if this SKU always uses a specific material
5. Save

That's the minimum viable SKU. From here you can add Variants, connect it to e-commerce integrations, and configure parametric model parameters if the part uses them.

Common SKU Architecture Mistakes

One SKU per color. This is the most common mistake and it compounds fast. If you sell a product in 6 colors, that's not 6 SKUs. It's 1 SKU with a Color Variant that has 6 options. The core principle: don't use SKU proliferation to handle option combinations.

Generic SKU values. SKU001, SKU002, SKU003 is technically valid but useless when you're debugging an order six months from now. Use descriptive values: BRACKET-WALL-SM-BLK, PLANTER-HEXAGON-LG.

Skipping the material assignment. If you leave material unset on a SKU, Printago can't route it intelligently. Always set the material, even if it's "any PLA."

Building SKUs before your parts library is organized. SKUs reference parts. If your parts library is a mess of vaguely-named files, your SKU catalog will reflect that. Organize parts first.

Multi-Part SKUs

When a product ships as multiple pieces (say, a two-part snap-fit enclosure) you have two options:

Multiple linked parts in one SKU. Both parts are in the SKU with their respective quantities. When the SKU is printed, both jobs go into the queue. This is the right choice when the parts are always printed together.

Separate SKUs. If you sometimes sell the parts separately, give them each their own SKU and handle bundling at the order level. More flexibility, slightly more management overhead.

Parametric SKUs

If your SKU uses a parametric model (OpenSCAD, CadQuery, or similar) with parameters like custom dimensions or engraved text, those parameters can be wired up through Variants. You can fix structural parameters at the SKU level and leave personalization parameters open for per-order input. The result is a single SKU that handles a wide range of customer configurations without manual intervention.

Organizing Your SKU Catalog

Use folders. Printago supports nested folders for both parts and SKUs, with thumbnail previews. Once you hit 50+ SKUs, navigating by product category or production line saves you real time.

A simple structure that works: top-level folders by product category (Wall Mounts, Planters, Cable Management), sub-folders by product line within each. Mirror the same structure in your parts library.

The Payoff

A well-built SKU catalog is the foundation everything else runs on. E-commerce integrations, order automation, queue routing: all of it depends on SKUs being set up correctly. Get this right once, and you won't have to think about it again.

SKU management is available on all Printago commercial accounts.