macOS Folder Icon Mail Organizer V1

The folder icon you've clicked ten thousand times, except this one holds the actual mail. Three printed parts that clip together, no screws and no glue, and a channel down the middle so envelopes stand in two groups instead of sliding into one pile at the back.

Size

175 × 86 × 142 mm

Filament

≈ 180 g

Parts

Three, clipped

Fits

Letter and A4 envelopes

Hardware

None

What it is

175 × 141.5 × 86 mm assembled, in three parts: a front panel, a spine, and a back panel. The spine is the one doing the work — it carries the clips the panels drop into, and the ridge that splits the stack in two.

The front panel is shorter than the back on purpose. You want to see what arrived without lifting anything out, and a folder is the one shape where that reads as design rather than as a mistake.

Because it's three separate parts, it's three separate colours if you want it to be. No AMS and no filament changes — you're just printing three things and clipping them together. It scales the same way: the parts are independent, so if your bed is bigger than ours you can take the whole thing up and it still fits together.

All three print flat on the bed. No supports, nothing bridging, and no overhang steeper than a chamfer. It's about 180 g over two plates, which is most of an afternoon but none of your attention.

Printing it

What we printed ours with. A starting point, not laws.

Layer height

0.24 mm on a 0.4 mm nozzle, 0.2 mm first layer

Walls

2 perimeters

Infill

15%, gyroid

Supports

None. Every part lies flat on its back.

Material

PLA. The load is a stack of paper leaning on a wall, which is about as gentle as a bracket gets.

Plates

Two. Around 3 hours 45 minutes and 180 g for the set.

If your printer disagrees with any of this, trust your printer.