There are variety of catheters available for each catheter size: 6 Fr Catheters 8 Fr Catheters 10 Fr Catheters 12 Fr Catheters 14 Fr Catheters 16 Fr Catheters 18 Fr Catheters 20 Fr Catheters 22 Fr Catheters Catheter sizes for children - 6F, 8F, and 10F are pediatric catheter sizes. Catheter sizes for adults - Catheter sizes 12–14F are normally sufficient for both men and women. Catheter sizes for female - Catheter sizes 12–14F are usually sufficient. female Catheter size 12F is usually used by women. Catheter sizes for male - Male catheter size 14F is commonly used by men. You can buy online different types of catheter such as female catheter, male catheter etc. and sizes at Hospitalsstore.com.