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Enclosures & cases
AirTag dog collar holder for 20 mm collars
A screw-closed AirTag holder that slides onto a 20 mm dog collar and sits flat against the neck, so the tag does not dangle, jingle or snag in bushes. The AirTag (31.9 mm diameter, 8 mm thick) sits in a 32.2 mm pocket 8.3 mm deep, the lid closes with two M2.5 screws, and the back has a 21 x 3 mm strap slot with rounded edges. The body is 42 x 42 x 13 mm with 2 mm walls, a small speaker opening on the lid, and prints in two flat halves. Open the ready-made model free, resize it on your phone or computer, then download a print-ready STL, 3MF or G-code sliced for your printer, free.Opening the ready-made model and downloading it as STL or 3MF are free, no card; AI changes use credits, from Maker at $7.99 a month.No printer? We print this part and ship it to your door. See its priceUpdated
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Adjust
Change its numbers in the viewer for free, or ask the AI in the chat: wall thickness, hole size, the thing it clips onto. AI changes use 2 credits per request (1 for a quick edit, 3 for a redesign), paid with a plan from Maker at $7.99 a month.3Print
Download a watertight STL or 3MF free, with your numbers and hand edits, or G-code sliced for your printer at the same price. After an AI change the download is included in every plan (4 credits without one).
Dimensions of the ready-made model (editable)
| Parameter | Value |
|---|---|
| outer width/length | 42 mm |
| total body height (base + pocket wall) | 13 mm |
| wall thickness | 2 mm |
| corner rounding radius | 4 mm |
| AirTag pocket diameter | 32.2 mm |
| pocket depth | 8.3 mm |
| speaker opening diameter | 10 mm |
| collar slot width (across) | 21 mm |
| collar slot height | 3 mm |
| fillet radius on slot | 1 mm |
| lid thickness | 2 mm |
| M2.5 screw | 2.5 mm |
| pilot hole for self-tap | 2.2 mm |
| screw boss diameter | 6 mm |
Example prompt
Model a 42 x 42 x 13 mm AirTag collar holder with a 32.2 mm diameter, 8.3 mm deep pocket, a lid fixed by two M2.5 screws, a 21 x 3 mm through slot on the back for a 20 mm collar with 1 mm fillets, a 10 mm speaker opening and 2 mm walls.
Fit notes
Collar widths run from 15 to 38 mm, so a downloaded holder is either too tight to fit or slides around. In SpeakCAD you give the collar width and thickness, preview the holder in the browser, add a name plate or a cat-size version in the chat, then download the STL and print it in PETG or TPU.
Questions people ask about an AirTag dog collar holder for 20 mm collars
A screw-closed AirTag holder that slides onto a 20 mm dog collar and sits flat against the neck, so the tag does not dangle, jingle or snag in bushes. The AirTag (31.9 mm diameter, 8 mm thick) sits in a 32.2 mm pocket 8.3 mm deep, the lid closes with two M2.5 screws, and the back has a 21 x 3 mm strap slot with rounded edges. The body is 42 x 42 x 13 mm with 2 mm walls, a small speaker opening on the lid, and prints in two flat halves.
Click Open it free on this page and create a free account (no card): the ready-made model opens in your browser, on your phone or computer, nothing to install. Change its numbers in the viewer for free and download a watertight STL or 3MF free, or G-code sliced for your printer at the same price. An AI change in the chat uses 2 credits per request (3 for a redesign), and the download after it is included in every plan (4 credits without one). Start with Maker: 50 credits a month for $7.99, cancel anytime.
On this page: open the ready-made model free in a SpeakCAD account (no card), change any dimension in the viewer, then download the STL or 3MF free, or G-code sliced for your printer at the same price.
A shared STL is modelled for someone else's measurements. Here you open the ready-made model free, change it to your measurements in the viewer, then download a file sized for the part you actually own, free as STL or 3MF.
Yes. SpeakCAD slices the part on its servers with OrcaSlicer and your printer's official profile (380+ printers, including Bambu Lab, Prusa, Creality and Elegoo), and you download the G-code (a sliced .gcode.3mf for Bambu Lab printers). G-code sliced for your printer costs the same as the STL: included in every plan, free for a part you shaped by hand, 4 credits without a plan for a part with AI work in it. Pick your printer on the printers page to see its profile.
No. SpeakCAD runs in the browser on your phone or computer: the chat, the 3D engine and the live viewer load in the tab. The only file you download is the finished STL, 3MF or sliced G-code.
Print it your way
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