Download sites have a thousand skulls. They do not have a lantern sized to your tea lights, a hook sized to your front door, a cookie cutter with your kid's name or a buckle for your costume belt. SpeakCAD makes those from your measurements, on your phone or computer: shape it by hand from a box or a plate, free, or describe it to the AI, and download the STL, the 3MF or G-code sliced for your printer. 40% off your first month of any plan with the code SPOOKY40, until 2 November: it applies itself at checkout.
Change a Halloween part live, no account
A real jack-o'-lantern, door sign, cookie cutter and door hook, in the same editor as the app. Turn it around, tap a number to change it (the tea light size, the text, the door thickness), or ask the AI for a change: 3 AI edits are free here. Press Another part to switch.Live demo
Four Halloween parts, ready to change
How it works
From an idea to a decoration on the bed
Measure the thing it must fit first: the tea light, the door, the belt, the post. That number is the whole difference between a download and a part that fits.1
Measure
A ruler is enough: the tea light across, the door's thickness, the belt's width, the post's side. Write it in millimetres.2
Describe it, or shape it by hand
Type what you want with that number ("a jack-o'-lantern cover for a 38 mm tea light, 2 mm walls"), one AI request (3 credits). Or start from the box, the plate or the cylinder shape and cut a face, add text and holes with the hand tools, free.3
Check it in 3D, change it
Turn it around, tap a face to read its size, and say what to change: wider eyes, a thinner strap, the name bigger. A changed size is a quick edit (1 credit); typing a number in the viewer spends nothing.4
Print it tonight
Download the STL or 3MF, or G-code sliced with the official profile of one of 380+ printers. No printer? Have it printed and delivered in about 2 to 3 weeks.The Halloween offer and what a part costs
| What | Cost |
|---|---|
| Code SPOOKY40 | 40% off the first month of Maker, Pro or Unlimited, first subscription, until 2 November (applied at checkout after visiting this page) |
| A part shaped by hand (box, plate, cylinder: holes, cuts, text, rounded corners) | Free, and the STL or 3MF downloads free |
| A new part described to the AI | 3 credits |
| A small change by chat / a quick edit | 2 credits / 1 credit |
| Download of a part with AI work in it | Included in every plan, 4 credits without one |
Halloween parts, ready to open in the editor
Each opens with the description already typed. Change the numbers to yours first.“A jack-o'-lantern cover for an LED tea light 38 mm across and 40 mm tall: a hollow pumpkin 75 mm across and 70 mm tall with eight vertical ribs, 2 mm walls, open at the bottom with a 39 mm opening, two upward-pointing triangle eyes, a triangle nose and a toothy grin with 2 mm gaps cut through the front, a short curved stem on top, printable without supports”
Open this prompt in the editor“A Halloween door sign 160 x 60 x 4 mm with rounded corners, the words TRICK OR TREAT raised 1.2 mm in letters 12 mm high, a small bat shape raised in each corner, and two 4 mm holes 10 mm from the top edge for a ribbon”
Open this prompt in the editor“A Halloween cookie cutter in the shape of a bat with spread wings and pointed ears, 90 mm wide: a 0.9 mm cutting edge 14 mm tall, and a flange 4 mm wide and 2 mm thick around the top edge for pressing, printed flange down”
Open this prompt in the editor“An over-the-door hook for a 45 mm thick front door: a flat strap 2 mm thick and 25 mm wide over the top of the door with a 47 mm inside gap, and on the outside a hook 60 mm down with a 20 mm deep J for a wreath ribbon”
Open this prompt in the editor“A costume belt buckle for a 38 mm belt: a rounded rectangle 70 x 50 x 5 mm with a raised skull emblem 2 mm high on the front, and on the back a 40 x 4 mm slot for the belt, all edges rounded 1 mm”
Open this prompt in the editor“A ghost luminary for an LED tea light 38 mm across: a tall rounded ghost 70 mm wide and 110 mm tall with a wavy bottom edge, 1.6 mm walls, open at the bottom, two oval eyes 12 x 18 mm and an open mouth cut through the front”
Open this prompt in the editorWhat to print for Halloween, by what it must fit
| Decoration | The number that matters | Guide |
|---|---|---|
| Jack-o'-lantern or ghost lantern | Tea light across (36 to 38 mm) | Lanterns that fit your LED tea lights |
| Cookie cutter, bat, ghost or a name | Edge 0.8 to 1 mm, 12 to 15 mm tall | Custom Halloween cookie cutters |
| Over-the-door hook, gutter clips, stakes | Door 35 or 45 mm, gutter lip | Hooks, clips and stakes |
| Buckle, horns, LED eyes, badge | Belt 25 / 38 / 50 mm, headband width | Costume parts in a weekend |
| Signs, place cards, name tags | The words | By hand: plate shape and Text, free |
All 25 ideas, grouped, with their prompts: Halloween 3D prints you can design yourself.
Download or design?
Download a Halloween STL when any size will do: a skull for the shelf, an articulated dragon. Design it when it must fit something: a lantern over your tea light, a hook over your door, a cutter with a name. Scaling a download in the slicer scales the opening, the slot and the wall with it, so it rarely fits. Found a model that is almost right? Upload the STL and change it: a bigger opening, a hole for a ribbon, a flat base.
Safety in three lines
- LED tea lights only in printed lanterns: PLA softens around 60 °C and burns.
- Cookie cutters: wash right after use in warm water, no dishwasher, no food storage in printed parts.
- Outdoors: PETG for stakes and hooks that carry weight; PLA creeps.
What it costs
Until 2 November, the code SPOOKY40 takes 40% off the first month of any plan (first subscription): visit this page and it applies itself at checkout, or type it on the payment page. Start with Maker: 50 credits a month for $7.99, cancel anytime. Shaping a part by hand and downloading it are free. A new free account also gets its first AI part free (not offered in every country): some accounts get the credits right away, others confirm with a card first (a free trial, nothing charged that day); downloading the part spends 4 credits without a plan, like any AI work (every plan includes downloads). No printer? Get it printed and delivered from $1.19 plus shipping, about 2 to 3 weeks: order before the last week of October.
Questions
Lantern covers for LED tea lights, door and yard signs, cookie cutters, hooks and clips for lights and decorations, costume buckles, badges and mask parts, and replacement parts for decorations that broke. The ones that must fit something are worth designing from your measurements in SpeakCAD, on a phone or a computer.
Yes: the code SPOOKY40 takes 40% off the first month of Maker, Pro or Unlimited for a first subscription, until 2 November 2026. It applies itself at checkout after you visit a Halloween page of speakcad.com, and can be typed on the payment page. The hand tools are free without it.
Yes. SpeakCAD runs in Safari on iPhone and in Chrome on Android, nothing to install: shape the part with the hand tools or describe it to the AI, and download the STL, the 3MF or G-code for your printer.
Stylised ones, yes: it sculpts simple figures (a skull, a ghost, a bat, horns) in its own CAD, printable and recognisable. For a detailed, scan-quality sculpture, download one from a model site and use SpeakCAD to resize it or add a base, a hole or a mount.
No, only an LED tea light or LED candle. PLA softens around 60 °C and PETG around 80 °C, and both burn.
Read more
25 Halloween prints you can designLights, doors, kitchen, costumes and fixes, with the prompts.A jack-o'-lantern that fitsTea light sizes, wall thickness for glow, the face cut-outs.Halloween cookie cuttersEdge, height, a name stamp, and using them with food.Hooks, clips and stakesDoor hooks, gutter clips, fence brackets, inflatable stakes.Costume parts in a weekendBuckles, horns, LED eyes, badges, props split for your bed.Change a downloaded STLA bigger opening, a hole, a flat base on a model you found.