Mason jars: regular (70 mm) and wide-mouth (86 mm), half-pint to half-gallon — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/mason-jars-and-lids/  (CC BY 4.0)
Basis: Ball / Kerr standard: regular mouth 70 mm (2.75 in) lid, wide mouth 86 mm (3.38 in) lid; jar outer dimensions typical, vary ±2 mm by maker
Catalog version: 2026-10-20

Sizes: see table below
- Lids: regular mouth Ø70 mm, wide mouth Ø86 mm (the flat disc); bands are 72 and 88 mm OD. Thread on the jar: 70 mm continuous-thread finish, about 15 mm tall; 86 mm about 17 mm.
- Jars (regular mouth): half-pint 8 oz Ø65 × 95 mm; pint Ø78 × 130; quart Ø90 × 175. Wide mouth: pint Ø86 × 125; quart Ø90 × 170; half-gallon Ø110 × 240. Glass 2.5–3.5 mm.
- A printed disc that replaces the flat lid is Ø70.0 or Ø86.0 × 2 mm and clamps with the stock band: that is the pressure boundary for a jar-bodied engine or a vacuum chamber (a quart jar holds full vacuum with margin). Keep flames off the glass; the jar is the cold side.

jar  mouth  lid_dia_mm  band_od_mm  jar_od_mm  height_mm
half-pint  regular  70  72  65  95
pint  regular  70  72  78  130
quart  regular  70  72  90  175
pint  wide  86  88  86  125
quart  wide  86  88  90  170
half-gallon  wide  86  88  110  240

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Mason jar — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Mason_jar
- Ball (Newell Brands): Ball canning jars and lids — web — Ball site [verify license at link] — https://www.ballmasonjars.com/
- Long Earth Society: Engine builds (videos and write-ups) — web, video — LES site — https://longearthsociety.com/engineering/

Xem Studio scan: not needed; this is a published standard. The sheet is the geometry.
API: https://xemstudio.com/api/geometry?object=mason-jars-and-lids