Christmas and Holiday Wreath (Locking Assembly)

Merry Christmas, Happy Holidays!

This project is inspired by my favorite interlocking blocks.  I like the creative designs other people shared, but I wanted to make my own version and custom features.  I modeled everything from scratch.

I made even more decorations for my holiday wreath.  They are outdoor and Halloween themed.

Key Features 

• No hardware, just printed parts

• No supports

• Threaded connectors secure everything

  • No guessing at tolerances for a friction fit

• Locking tabs for hexagon and octagon wreaths

• Single and multicolor decorations 

• Built-in hanger

Size

I made these leaves and branches at a smaller scale than other designs.  This saved me a lot of time because I can fit more leaves on my print bed.  The inner diameter for holes is 17.6 mm, and the outer diameter is 26.4 mm.  Studs are 6.6 mm tall.

You can take a “standard” size decoration (30 mm outer diameter) and scale it to 88% to fit this design.  There are two important notes.  First, scaling like this also shrinks the original tolerance.  Second, scaling to 88% will not match the inner diameter.

Connectors, Parts, and Files

Decorations on the corners/joints form a nut and bolt pair that locks everything in place.  You could use glue instead, but adding decorations is the point of this project.

Hexagon wreath required parts:

• 3 top leaves

• 2 bottom leaves 

• 1 hanger (bottom) leaf

• 6 decorations 

• 6 double height bolts

• plus extra decorations with single height bolts

Octagon wreath required parts:

• 4 top leaves 

• 3 bottom leaves 

• 1 hanger (bottom) leaf

• 8 decorations 

• 8 double height bolts

• plus extra decorations with single height bolts

Use a double height bolt to connect branch+branch+decoration.  Use a single height bolt to connect branch+decoration.

Single color prints are available as step files.  Multicolor prints are available as 3mf files — load them into your slicer as a single object with multiple parts.

Multicolor Decorations

I do not have an automated way to change filament, so my multicolor designs are simplified.  Color changes start on the first layer and end at Z = 0.62 mm.  This rounds to 3 layers if you use 0.2 mm layer height.

Be careful putting dark colors on top of light colors.  Some of the dark color can show through, making the light color look tinted. 

Some designs do not have a single color version, and some designs have an alternate or simplified multicolor version.

Thanks for visiting, and enjoy!

Update 9/6/2026:  New pictures, cleaned up several designs, single color decorations are now step files, added alternate versions, and increased the thickness of multicolor sections.