How to Prepare an STL File for 3D Printing — Step-by-Step Guide

How to prepare a 3D file for printing

First time ordering 3D prints? You're probably wondering: "How do I send the file?" Here's what to do.

Accepted formats

Don't send: photos, JPG, PDF — those need 3D modeling first.

Preparation steps

1. Check units — mm, not cm or inches

2. Size must fit 256×256×256mm (or split into sections)

3. Mesh integrity — no holes, no inverted faces

4. Orientation affects quality and supports (we optimize this)

Minimum thicknesses

• Walls: 0.8mm (1.6mm for functional parts)
• Fine features: >0.5mm
• Screw holes: +0.2mm tolerance
• Embossed text: min 12pt font

Multi-color parts

We have AMS — up to 4 colors at once. Send 3MF or separate STLs + reference image.

Include with your file

• Quantity
• Material (or ask us)
• Deadline
• Part application

Send your file