Answer
Apr 07, 2026 - 11:43 AM
External catheters are typically sized by anatomical fit rather than by the French (Fr) scale used for internal catheters. Proper sizing helps the external catheter fit securely and work with the connected urine collection system.
Sizing methods can vary by product, so manufacturer size charts and product details should be reviewed carefully before ordering. External catheter sizing is different from intermittent and Foley catheter sizing, which commonly uses French sizes.
