MagSafe charger puck and Apple Watch charger dimensions, MagSafe case thickness limit — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/magsafe-and-watch-chargers/  (CC BY 4.0)
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
Catalog version: 2026-10-20

Sizes: see table below
- 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.

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

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- ChargerLAB: Review of the Apple 25 W MagSafe charger (caliper measurements) — web — Publisher's page; dimensions are facts — https://chargerlab.com/review-of-apple-25w-magsafe-charger
- ChargerLAB: Teardown of the Apple 25 W MagSafe charger — web — Publisher's page; dimensions are facts — https://chargerlab.com/teardown-of-apple-25w-magsafe-charger-hk-a2580
- MakerWorld (maker measurement): MagSafe 25 W puck holder: 55.49 × 4.53 — web — Publisher's page; dimensions are facts — https://www.makerworld.com/en/models/897648
- 9to5Mac: Apple's accessory design guidelines: MagSafe details — web — Publisher's page; dimensions are facts — https://9to5mac.com/2020/11/02/apple-updates-its-accessory-design-guidelines-with-new-magsafe-details/
- Apple: MagSafe Charger (1 m) — web — Publisher's page; dimensions are facts — https://apple.com/shop/product/MX6X3LL/A/magsafe-charger-1-m
- Printables (maker notes): MagSafe phone and watch stand — web — Publisher's page; dimensions are facts — https://www.printables.com/model/996909-15w-magsafe-phone-and-watch-stand

Free files (CC BY 4.0, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/magsafe-and-watch-chargers/index.json
API: https://xemstudio.com/api/geometry?object=magsafe-and-watch-chargers