قسطرة فولي

The most common sizes are 10 F to 28 F. 1 F is equivalent to 0.33 mm = .013″ = 1/77″ of diameter. Foley catheters are usually color coded by size with a solid color band at the external end of the balloon inflation tube, allowing for easy identification of the size.^[4] Note: Colors for French sizes 5, 6, 8, 10 may vary significantly if intended for pediatric patients. Color for French size 26 may also be pink instead of black.

Sizes

Color	French units	mm
	Yellow-green	6	2.0
	Cornflower Blue	8	2.7
	Black	10	3.3
	White	12	4.0
	Green	14	4.7
	Orange	16	5.3
	Red	18	6.0
	Yellow	20	6.7
	Purple	22	7.3
	Blue	24	8.0
	Black	26	8.7