Boookenstack - TPU Sandals with Stackable Soles

From the underworld of style.

Meet the Boookenstack, a frightfully fun, support-free, modular, 3D-printed TPU sandal, featuring stackable sole layers for:

• adjustable height
• customized cushioning
• selectable stripe count

Designed for support-free printing, every layer prints cleanly on its own — no trimming, no wasted filament, no post-processing nightmares. Just print, snap-fit, and slide your feet into comfort.

Whether you’re dressing up for Halloween, cosplay, or just looking for a comfortable, supportive sandal, you can lay your feet to rest in the Boookenstack.

Features

• 🪦 Support-free print – designed to rise clean, no supports or sorcery required.
• ⚫⚪ Stackable sole layers – alternate black & white for Beetlejuice stripes.
• 🧱 Modular fit system – adjust height and cushioning by adding or removing midsole layers.
• 🌈 Customizable colors – print parts in different colors without needing an AMS. 
• 🦶 Contoured footbed – comfortable arch support and roomy toe box.
• 🧩 Snap-fit assembly – quick to print, easy to customize.

Suggested Print Settings

• Material: TPU (Shore 95A recommended)
• Layer height: 0.2 mm
• Infill: adjust infill density for weight and stack height - 10% gyroid works for a 150 lb person on a 6-layer stack)
• Supports: None required 🎉
• Orientation: Print each layer flat on bed
• Assembly: Step on the stack to snap-fit together

Sizing

Before printing, scale all the sandal components with your slicer, to match your shoe size, using the table below:

Only scale in the X and Y directions.
The Z-scale should remain at 100%

180x180mm beds support up to US size 1 youth.

256x256mm beds support up to US size 9 men.
350x320mm beds support up to US size 16 men.