Big Macks 3D

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Fits-Anything Clamshell Case

Fits-Anything Clamshell Case

A case for anything. Seriously. Anything.

FREE

A hinged case built around whatever goes in it — cotton buds, floss picks, calipers, scissors, headphones, golf balls, anything. If it fits on your printer's build plate, you can make a case for it. Set the inside and the whole thing regenerates: a print-in-place hinge that arrives already working, snapped into a base and lid that shut with a sprung catch.

Configure & buy

Measure what you want to keep, not the box. Give it an inside length, width and depth and every part rebuilds around those numbers — the hinge grows with the case, so a floss-pick tin and a caliper case are the same design at two sizes rather than two designs.

The hinge prints closed, in place, already hinged. No pin to push, no knuckles to thread, nothing to glue. It lifts off the plate working, and clips into the base and lid on barbed connectors.

Decide how the depth splits: an even clamshell that opens like a book, or a shallow lid on a deep tray when the contents only want one side. A sprung catch holds it shut, and a thumb relief in the rim flicks it open.

Highlights

Built to your contents

Set the inside length, width and depth — every part regenerates around your numbers.

Choose the split

Decide how the depth divides between lid and base, from an even clamshell to a shallow lid on a deep tray.

Print-in-place hinge

The hinge prints closed as one piece and comes off the plate already working — no pins, no assembly.

Snaps together

The hinge clips into the base and lid on barbed connectors. No screws, no glue.

Snap-shut catch

A sprung catch holds it closed, with a thumb relief in the rim to flick it open.

Free

Configure, preview in 3D, and download at no cost.

Configure & buy

In your download

  • Print-ready 3MF platesEvery part laid out on plates packed to your printer's bed and sorted by filament color — open in your slicer and go.
  • Every STLThe individual part meshes as well, if you'd rather arrange the plates yourself.
  • A parts listA manifest of every part and how many of each, so you know exactly what you're printing.
  • An assembled 3D model in your colorsThe whole thing built and colored the way you configured it — your reference while you print and put it together.

Configure your case

Colors
PrimarySecondaryTertiary

We'd love it if you could help get the Big Mack's word out! The logo sits on the lid. Embossed cuts the mark into the surface, prints on any printer. 3-color prints it in our red, white and black and needs a multi-filament printer.

Give it the inside you need and every part rebuilds around it — the hinge grows with the case. It downloads as three parts: a base, a lid, and a hinge that prints closed and comes off the plate already working. They clip together on barbed connectors, so there is nothing to glue and no pin to push.

Price: FREE (one licensed file — $1.00 off for carrying our logo)

Click “Update 3D preview” to render your configuration in 3D.

Add your printer

We size every model to your printer, so we need to know how big it can print. It’ll be saved for the next person with the same machine.

These are the printable sizes — the biggest part your printer can actually make, the numbers your slicer shows as the build volume. Not the bed or the removable plate, which are usually a little bigger.

Optional — build plate and printer-stand measurements

The build plate is the removable sheet you pop prints off; it’s usually a little bigger than the printable area. A plate rack is cut to the sheet, not the bed.

A printer stand is built around your printer’s feet. Give us all four and we can build you one — or skip them and add them later. Measure the BASE — the slab it stands on — not the machine’s widest point. Gantry legs, Z columns and X arms usually overhang the base and hold up nothing.

Where to measure your printer's feet Looking down on the printer's base with the front at the bottom. A is the full width of the base across the front. B is the diameter of one foot. C is from the base's front edge back to the center of the front foot. D is from the base's side edge in to that same center. FRONT rear feet — not needed A D C B
Looking down on the base, front at the bottom.

My printers

Every model is sized to the printer doing the printing, and the logo and engraved sizes come as color inlays only where you can print them. The one at the top is the one new configurations start on — pick any row to make it that.

Adding one is the same picker: choose it in My Printer, or .

Choose your colors

Every model on the site opens in these three. Primary is the largest surface, secondary the part that contrasts with it, and tertiary the accent — feet, trim, the parts that tie it together.