| nail (cloth) | 1 nail (cloth) | 2 nail (cloth) | 3 nail (cloth) | 4 nail (cloth) | 5 nail (cloth) | 6 nail (cloth) | 7 nail (cloth) | 8 nail (cloth) | 9 nail (cloth) | 10 nail (cloth) | 11 nail (cloth) | 12 nail (cloth) | 13 nail (cloth) | 14 nail (cloth) | 15 nail (cloth) | 16 nail (cloth) | 17 nail (cloth) | 18 nail (cloth) | 19 nail (cloth) | 20 nail (cloth) | 21 nail (cloth) | 22 nail (cloth) | 23 nail (cloth) | 24 nail (cloth) | 25 nail (cloth) | 26 nail (cloth) | 27 nail (cloth) | 28 nail (cloth) | 29 nail (cloth) | 30 nail (cloth) | 31 nail (cloth) | 32 nail (cloth) | 33 nail (cloth) | 34 nail (cloth) | 35 nail (cloth) | 36 nail (cloth) | 37 nail (cloth) | 38 nail (cloth) | 39 nail (cloth) | 40 nail (cloth) | 41 nail (cloth) | 42 nail (cloth) | 43 nail (cloth) | 44 nail (cloth) | 45 nail (cloth) | 46 nail (cloth) | 47 nail (cloth) | 48 nail (cloth) | 49 nail (cloth) | 50 nail (cloth) | 51 nail (cloth) | 52 nail (cloth) | 53 nail (cloth) | 54 nail (cloth) | 55 nail (cloth) | 56 nail (cloth) | 57 nail (cloth) | 58 nail (cloth) | 59 nail (cloth) | 60 nail (cloth) | 61 nail (cloth) | 62 nail (cloth) | 63 nail (cloth) | 64 nail (cloth) | 65 nail (cloth) | 66 nail (cloth) | 67 nail (cloth) | 68 nail (cloth) | 69 nail (cloth) | 70 nail (cloth) | 71 nail (cloth) | 72 nail (cloth) | 73 nail (cloth) | 74 nail (cloth) | 75 nail (cloth) | 76 nail (cloth) | 77 nail (cloth) | 78 nail (cloth) | 79 nail (cloth) | 80 nail (cloth) | 81 nail (cloth) | 82 nail (cloth) | 83 nail (cloth) | 84 nail (cloth) | 85 nail (cloth) | 86 nail (cloth) | 87 nail (cloth) | 88 nail (cloth) | 89 nail (cloth) | 90 nail (cloth) | 91 nail (cloth) | 92 nail (cloth) | 93 nail (cloth) | 94 nail (cloth) | 95 nail (cloth) | 96 nail (cloth) | 97 nail (cloth) | 98 nail (cloth) | 99 nail (cloth) | 100 nail (cloth) |
| french; charriere | 171.45 F | 342.9 F | 514.35 F | 685.8 F | 857.25 F | 1,028.7 F | 1,200.15 F | 1,371.6 F | 1,543.05 F | 1,714.5 F | 1,885.95 F | 2,057.4 F | 2,228.85 F | 2,400.3 F | 2,571.75 F | 2,743.2 F | 2,914.65 F | 3,086.1 F | 3,257.55 F | 3 429 F | 3,600.45 F | 3,771.9 F | 3,943.35 F | 4,114.8 F | 4,286.25 F | 4,457.7 F | 4,629.15 F | 4,800.6 F | 4,972.05 F | 5,143.5 F | 5,314.95 F | 5,486.4 F | 5,657.85 F | 5,829.3 F | 6,000.75 F | 6,172.2 F | 6,343.65 F | 6,515.1 F | 6,686.55 F | 6 858 F | 7,029.45 F | 7,200.9 F | 7,372.35 F | 7,543.8 F | 7,715.25 F | 7,886.7 F | 8,058.15 F | 8,229.6 F | 8,401.05 F | 8,572.5 F | 8,743.95 F | 8,915.4 F | 9,086.85 F | 9,258.3 F | 9,429.75 F | 9,601.2 F | 9,772.65 F | 9,944.1 F | 10,115.55 F | 10 287 F | 10,458.45 F | 10,629.9 F | 10,801.35 F | 10,972.8 F | 11,144.25 F | 11,315.7 F | 11,487.15 F | 11,658.6 F | 11,830.05 F | 12,001.5 F | 12,172.95 F | 12,344.4 F | 12,515.85 F | 12,687.3 F | 12,858.75 F | 13,030.2 F | 13,201.65 F | 13,373.1 F | 13,544.55 F | 13 716 F | 13,887.45 F | 14,058.9 F | 14,230.35 F | 14,401.8 F | 14,573.25 F | 14,744.7 F | 14,916.15 F | 15,087.6 F | 15,259.05 F | 15,430.5 F | 15,601.95 F | 15,773.4 F | 15,944.85 F | 16,116.3 F | 16,287.75 F | 16,459.2 F | 16,630.65 F | 16,802.1 F | 16,973.55 F | 17 145 F |
A nail, as a unit of cloth measurement, is generally a sixteenth of a yard or 2 1/4 inches (5.715 cm). The nail was apparently named after the practice of hammering brass nails into the counter at shops where cloth was sold.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| nail (cloth) | ≡ 2 1⁄4 in | = 0.05715 m | Other (Length) |
| nails (cloth) | french; charriere | nails (cloth) | french; charriere |
|---|---|---|---|
| 1 | = 171.45 | 4 | = 685.8 |
| 1.5 | = 257.175 | 4.5 | = 771.525 |
| 2 | = 342.9 | 5 | = 857.25 |
| 2.5 | = 428.625 | 5.5 | = 942.975 |
| 3 | = 514.35 | 6 | = 1028.7 |
The French scale or French gauge system is commonly used to measure the size of a catheter. It is most often abbreviated as Fr, but can often be seen abbreviated as Fg, Ga, FR or F. It may also be abbreviated as CH or Ch (for Charrière, its inventor).
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| french; charriere | F | ≡ 1⁄3 mm | = 0.3×10−3 m | Other (Length) |
| french; charriere | nails (cloth) | french; charriere | nails (cloth) |
|---|---|---|---|
| 1 | = 0.0058326042578011 | 4 | = 0.023330417031204 |
| 1.5 | = 0.0087489063867017 | 4.5 | = 0.026246719160105 |
| 2 | = 0.011665208515602 | 5 | = 0.029163021289006 |
| 2.5 | = 0.014581510644503 | 5.5 | = 0.032079323417906 |
| 3 | = 0.017497812773403 | 6 | = 0.034995625546807 |
| nails (cloth) | french; charriere |
|---|---|
| 1 | = 171.45 |
| 0.0058326 | = 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |