Test the Fit in Paper or Foam Before You Cut

You know that moment when you’ve already cut into leather and then realize the fit is off? That’s exactly why mockups matter. Before touching leather, Prince almost always makes a paper or foam mockup first. Ten minutes of paper and tape regularly saves an expensive piece of hide.

Watch: Test the fit in paper or foam before cutting leather

Paper or foam? Both have a job

Paper mockups

Print the pattern, tape it together, and you can quickly see whether the proportions work on your body. You don’t have to be precise when cutting a paper mockup; the rough outline is enough to judge size and placement. Two things to know:

• Paper will crinkle and some holes won’t line up exactly. That’s expected; the pattern is designed for the thicker final material.
• Don’t fit the paper skin-tight. Allow for the thickness of the leather you’ll use. If the paper mockup fits snugly, bump the print scale up a percent or two.

Watch: the paper mockup rules, in Do This BEFORE You Craft Your Leather Armor (2:39)

Foam mockups

For a sturdier test, build the mockup in high-density EVA foam; Prince uses 4mm for mockups. Foam holds its shape well enough for prototyping and fit testing. It won’t hold form like wet-formed leather and may need some support, but with additional finishing effort a foam build can even serve as a cosplay piece in its own right.

Assembly can be quick and dirty: cheap office brads stabbed through the foam hold a mockup together fine. If you want to wear-test it harder, double-capped rivets or Chicago screws (the same hardware as the leather projects) are sturdier options.

Watch: foam mockup assembly options, in the Berserk Armor foam build (2:09)

No foam on hand?

Mockups work with a wide variety of materials: cardboard, leftover fabric from previous projects, or whatever your local craft store has on clearance. The point isn’t the material; it’s confirming the fit before your good material is committed.

Common questions

Where to go next

When the mockup fits, transfer any scale or shape adjustments to your pattern and cut your final material. Scaling mechanics: Why our patterns come in one scalable size. Choosing your final material: Foam or leather?