Free tools for the trade
Free 3D printable hat blocks, made for your measurements.
Blocksmith Works helps hat makers and milliners create full-size crown-block STL files without an account, subscription, or paywall.
Create a free hat blockWhat you can make
The current workshop creates a made-to-measure crown block, a matching BS-1.0 stand, and a recommended dimensional fit check. Start with the finished hat size, choose round, standard oval, or long oval, then select the crown height and profile that fit the hat you are building.
The output is a full-size STL file. Open it in your slicer at 100% scale, inspect the dimensions, and print it on the material and settings appropriate for the work you intend to do.
Why use a printable hat block?
A printed block is not a replacement for the skill at the bench. It is a way to test a size or profile, build a practical working tool, and avoid needing a separate traditional block for every starting idea. The choice of material, print setup, surface finish, steam, and felt all still matter.
Before you generate the STL
- Confirm whether the finished hat calls for round, standard oval, or long oval.
- Use the intended finished size—not a guess based only on a labeled hat.
- Choose the crown height and profile as a starting form; final shaping remains a bench skill.
- Read the hat-block printing guide before your first working print.
More free hatmaking tools
The Community Tool Crib is a separate library of free, community-contributed printable tools. Every contributor keeps visible credit and each listing points to its original source.