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 Charriere, charriÃ¨re its). inventor round catheter of 1 French has an external diameter of 1â3 mm, and therefore the diameter of a round catheter in millimetres can be determined by dividing the French size by 3: D (mm) = Fr / 3. or. Fr = D (mm) * 3. For example, if the French size is 9, the diameter is 3 mm.
This article is about the stringed musical instrument. For other uses, see Cello (disambiguation). The cello (/ËtÊÉloÊ/ CHEL-oh; plural cellos or celli) or violoncello (/ËvaÉªÉlÉnËtÊÉloÊ/ VY-É-lÉn-CHEL-oh; Italian pronunciation: [vjolonËtÊÉllo]) is a bowed string instrument with four strings tuned in perfect fifths. The strings from low to high are generally tuned to C2, G2, D3 and A3, an octave lower than the viola.
Cello Sizes. Cellos should fit their players. The size makes a difference in both the distance the musician must reach to the fingerboard of the instrument and the distance the notes are separated on the fingerboard. Cellos sizes are denoted in fractions: 4/4, 3/4, 1/2, 1/4, 1/8, etc.However the fraction nomenclature can be misleading because, for example, a 1/2 size cello isn't really half the size of a 4/4 cello, as you can see by the chart below. Often the teacher will measure the student and write down the correct size to get.ellos should fit their players. The size makes a difference in both the distance the musician must reach to the fingerboard of the instrument and the distance the notes are separated on the fingerboard. Cellos sizes are denoted in fractions: 4/4, 3/4, 1/2, 1/4, 1/8, etc.