Cigars are commonly categorized by their size and shape, which together are known as the vitola. The size of a cigar is measured by two dimensions: its ring gauge (its diameter in sixty-fourths of an inch) and its length (in inches).
The most common shape is the parejo, sometimes referred to as simply "coronas", which have traditionally been the benchmark against which all other cigar formats are measured. They have a cylindrical body, straight sides, one end open, and a round tobacco-leaf "cap" on the other end which must be sliced off with a guillotine style cutter, or punched through before smoking.
| Cigar Name | Length in inches | Ring Guage in 64ths | Metric length | Metric width | |
|---|---|---|---|---|---|
| Cigarillo | ~ 3 + ½ | ~ 21 | ~ 8 cm | ~ 8 mm | |
| Rothschild | 4 + ½ | 48 | 11 cm | 19 mm | |
| Robolo | 4 + ½ | 60 | 11 cm | 24 mm | |
| Robusto | 4 + ⅞ | 50 | 12 cm | 20 mm | |
| Small Panatela | 5 | 33 | 13 cm | 13 mm | |
| Ascot | 4 + ½ | 24 | 11 cm | 13 mm | |
| Petit Corona | 5 + ⅛ | 42 | 13 cm | 17 mm | |
| Carlota | 5 + ⅝ | 35 | 14 cm | 14 mm | |
| Corona | 5 + ½ | 42 | 14 cm | 17 mm | |
| Corona Gorda | 5 + ⅝ | 46 | 14 cm | 18 mm | |
| Panatela | 6 | 38 | 15 cm | 15 mm | |
| Toro | 6 | 50 | 15 cm | 20 mm | |
| Corona Grande | 6 + ⅛ | 42 | 16 cm | 17 mm | |
| Lonsdale | 6 + ½ | 42 | 17 cm | 17 mm | |
| Churchill | 7 | 47–50 | 18 cm | 19–20 mm | |
| Double Corona | 7 + ⅝ | 49 | 19 cm | 19 mm | |
| Presidente | 8 | 50 | 20 cm | 20 mm | |
| Gran Corona | 9 + ¼ | 47 | 23 cm | 19 mm | |
| Double Toro/Gordo | 6 | 60 | 15 cm | 24 mm |