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MagSafe charger puck and Apple Watch charger dimensions, MagSafe case thickness limit
What is the diameter of the MagSafe charger? · Modern device · basis: Caliper measurements from a charger review site, a teardown and makers (MagSafe 25 W); Apple's accessory guidelines as reported by the press; Apple product listings for cable lengths
Also called: magsafe charger diameter, magsafe puck dimensions, apple watch charger size, magsafe stand 3d print, magsafe case thickness
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 4 in table
Notes
- MagSafe 25 W charger (2024+): Ø55.4–55.5 mm, 4.45–4.53 mm thick (three independent caliper measurements); braided cable about Ø2.35, 1 m or 2 m.
- Original 15 W MagSafe charger: makers report it slightly larger and thicker (about Ø56 × 5.4) but no reliable measurement is published; measure yours before cutting a press-fit pocket.
- MagSafe accessories (Apple's guidelines, as reported): case thickness over the magnet ring 2.0 mm recommended, 2.1 mm maximum; self-alignment within 1.55 mm; removal force 800–1,100 gf.
- Apple Watch magnetic fast charger: commonly given as Ø27.9 × 6.3 mm with a radial cable exit; Apple does not publish it, so check yours. The older puck is about 2 mm thicker (maker report). Cable 1 m.
- Inserts (free STL): the puck face sits flush, the cable leaves through the slot; glue into a stand or screw through the floor.
MagSafe charger puck and Apple Watch charger dimensions, MagSafe… size chart
| item | diameter (mm) | thickness (mm) |
|---|---|---|
| MagSafe charger 25 W | 55.4–55.5 | 4.45–4.53 |
| MagSafe charger 15 W (unverified) | ≈56 | ≈5.4 |
| Apple Watch fast charger (unverified) | 27.9 | 6.3 |
| MagSafe case limit over the ring | None | 2.0 rec. / 2.1 max |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| ChargerLAB | Review of the Apple 25 W MagSafe charger (caliper measurements) | web | Publisher's page; dimensions are facts |
| ChargerLAB | Teardown of the Apple 25 W MagSafe charger | web | Publisher's page; dimensions are facts |
| MakerWorld (maker measurement) | MagSafe 25 W puck holder: 55.49 × 4.53 | web | Publisher's page; dimensions are facts |
| 9to5Mac | Apple's accessory design guidelines: MagSafe details | web | Publisher's page; dimensions are facts |
| Apple | MagSafe Charger (1 m) | web | Publisher's page; dimensions are facts |
| Printables (maker notes) | MagSafe phone and watch stand | web | Publisher's page; dimensions are facts |
Free files
★ Free files 3 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| magsafe-25w-puck-envelope | MagSafe 25 W charger puck envelope Ø55.5 × 4.5 mm | STEP · STL |
| magsafe-25w-dock-insert | Dock insert for the MagSafe 25 W puck: Ø55.8 pocket 4.6 deep, 3 mm cable slot | STEP · STL |
| watch-charger-dock-insert | Dock insert for the Apple Watch fast charger puck: Ø28.2 pocket 6.4 deep (check your puck: see notes) | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=magsafe-and-watch-chargers
Fits with
Questions
What size is the MagSafe charger?
The 25 W MagSafe puck is about 55.5 mm across and 4.5 mm thick.
How thick can a MagSafe case be?
Apple recommends 2.0 mm over the magnet ring, 2.1 mm maximum.