What is a cigar ring gauge?

A ring gauge is a cigar's diameter measured in 64ths of an inch. A ring gauge of 50 means the cigar is 50/64 of an inch across, which is 0.781 inches or about 19.8 millimetres.

How do you convert ring gauge to millimetres?

Divide the ring gauge by 64 to get inches, then multiply by 25.4 to get millimetres. A 50 ring gauge is 50 ÷ 64 × 25.4 = 19.8 mm.

Does a bigger ring gauge mean a stronger cigar?

No. A larger ring gauge holds more filler relative to wrapper, which usually makes a cigar taste smoother and burn cooler, not stronger. Strength comes from the leaf and the blend, not the width.

Tools

Ring gauge converter

A cigar’s ring gauge is its diameter in 64ths of an inch. That is the entire definition — a 50 ring gauge is 50/64 of an inch across. The number looks like a scale of its own only because nobody says the “64ths” part out loud.

Ring gauge

Inches: 0.781″
Millimetres
As a fraction: 50/64″

Relative size

50 · Robusto

Drawn in proportion, not at life size — a browser cannot know your screen’s pixel density, and a ruler that is quietly off by a few millimetres is worse than none. Use the millimetre figure with calipers for a real measurement.

Common sizes

How the maths works

Divide by 64 for inches, then multiply by 25.4 for millimetres:

50 ÷ 64 = 0.781″ · 0.781 × 25.4 = 19.8 mm

Going the other way, measure the diameter in millimetres, divide by 25.4 and multiply by 64. Calipers give a usable figure; a ruler against a curved surface generally does not.

What ring gauge actually changes

The wrapper-to-filler ratio. A wrapper is roughly the same thickness whatever the size, so a wider cigar holds much more filler behind it. Since the wrapper is the most flavourful leaf, a thin cigar tastes more of its wrapper and a thick one more of its blend.
Burn temperature. More surface area sheds more heat, so a larger gauge tends to burn cooler and slower. That is why a gordo often reads smoother than a corona of the same blend.
Draw. More filler means more air channels. A wide cigar is usually an easier draw — and easier to over-fill in the roll, which is where plugged cigars come from.
Not strength.Wider is not stronger. Strength is a function of the leaf — ligero from the top of the plant — and the blender’s ratios. A 60-gauge mild cigar and a 42-gauge powerhouse both exist.

Common vitolas

A vitola names a shape: a ring gauge and a length together. These are the figures most brands cluster around, though every house adjusts its own.

Vitola	Ring	Length	Character
Panetela	34–38	5–7″	Thin and elegant. Less filler means the wrapper carries more of the flavour, and it burns hot if you smoke it quickly.
Lancero	38–40	7–7½″	The blender's format — a narrow, long stick that shows a blend honestly. Traditionally finished with a pigtail cap.
Corona	42	5½″	The reference size against which every other vitola is described. If a review says a blend is 'best in a corona', this is what it means.
Corona Gorda	46	5⅝″	A corona given more girth. Cooler than a corona over the same smoking time.
Churchill	47	7″	Named for the man who smoked them. Long enough to change character three times as it burns.
Robusto	50	5″	The most-smoked size in the United States. Short and thick — full flavour in about 45 minutes.
Toro	50–52	6″	A robusto with another inch. The size most new blends launch in, because it gives the filler room to develop.
Torpedo / Belicoso	52	6″	A tapered head rather than a distinct width. Narrowing the cap concentrates smoke on the palate.
Gordo / Gigante	60+	6″	Modern and divisive. More filler relative to wrapper, so the blend reads sweeter and burns cooler and slower.

Skip the measuring

Photograph the band and The Cigar Scanner reads the vitola, ring gauge, wrapper and origin back to you — no calipers, no guessing which Toro you are holding.

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